How Haldex (AWD) All Wheel Drive Works ~ Teardown and inspection

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Today we look at how VW and Audi Haldex All Wheel Drive (AWD) systems work. How VW and Audi get all wheel drive on some cars. We also teardown a 215,000 mile Haldex and rear differential. This video started out as a limited slip differential install. However I exploded part of the original diff. I lucked out and got a second diff with a Haldex unit.
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The content of this video is available for informational and educational purposes only. It is not intended to be a substitute for the professional advice of a mechanic who has personally inspected your vehicle, nor does it create a relationship of any kind between the Humble Mechanic and you. Every situation may be different, and the Humble Mechanic does not make any warranties, whether express or implied, as to the accuracy, fitness, or applicability of the information or automotive parts portrayed in this video to any project and makes no guarantee of results. The Humble Mechanic and any sponsors of this video will not be liable for any damages related to personal injury, property damage or loss of any kind that may result from the use or reliance on this video and/or any automotive parts represented in this video. You are using the information and automotive parts portrayed in this video solely at your own risk.

Опубликовано:

29 сен 2024

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Комментарии : 562

@HumbleMechanic 3 года назад

Something I am not sure how I forgot to mention. The Haldex and diff fluid are DIFFERENT. If you do the service, be sure to use the proper fluid.

@blackpete 3 года назад

Simply RTFM. Different diff, different oil. Just look it up, to be sure. Helps not killing things. 😇

@tm199100 3 года назад

Charles, have it dry ice cleaned

@Xappt 3 года назад

Please do the diy! I am absolutly enjoing the videos!

@donbrashsux 3 года назад

I’m glad you mentioned this fact as no one else points this important fact out to all the DIY legends

@Xappt 3 года назад

What LSD is it? Looking forward to do it myself!

@acefighterpilot 3 года назад

For all the hate this system gets, I have to say it's an incredibly simple and cost effective piece of engineering for what it does, especially given the alternatives. It's enough to pull off power slides with my 7R when it's cold out, and that's enough for me on the street.

@Swordie100 3 года назад

I think I need to watch that haldex explanation more than once.. :")

@Nobody-U-Want-2-Know 3 года назад

C’mon man... Powder coat that Haldex!

@biggabenne 3 года назад

yes pleaseeee

@MrWickedr32 3 года назад

Dry ice blast it

@tomthompson7400 3 года назад

The man who never made a mistake , never made anything.

@tt-rs1457 3 года назад

By all means ! Wer arbeitet, macht Fehler........

@polo16v191 3 года назад

@@tt-rs1457 Yes exactly. Il n'y a que ceux qui ne font rien, qui ne font pas d'erreurs :)

@PatricioGarcia1973 3 года назад

From mistakes we learn, albeit sometimes the mistakes are on the expensive side...

@robertwilliams7768 3 года назад

This ^

@natelysy3114 3 года назад

Man made it, man broke it, man can fix it.

@gplusgplus2286 3 года назад

DIY detailed install P L E A S E ! ! ! No other video exists of this job ( I have a spare haldex waiting for this). Also, I hear you need to also put an LSD at the front gearbox/transfer case; the front LSD has more pronounced result than the rear LSD (obviously better to do both).

@TimppTV 3 года назад

Almost 5 years at a VW/Audi dealer as a tech I could never wrap my head around how a Haldex worked. All I needed was this video! Do newer Haldex units work in a similar way?

@colinwie9192 3 года назад

There's actually some more stuff Charles missed. This is a gen 1 haldex which actually works on a mostly mechanical(ish) function. The rollers that fell out when Charles pulled the clutch drum assembly, those are parts of the mechanical pump and piston function. The small rollers act on a Cam plate/Lobed plate which serves as the "pump" plate, the three big rollers act on the piston plate which applies pressure on the clutch pack. The pumping action starts as soon as there's a difference in shaft rotation speed between the input and output. The electric pump really only serves to prime the system and charge the accumulator. System regulation is handled through the regulating valve. Basically, when you're easy cruising/coasting/parking with no wheel slip, the system is always at the ready to lock up for AWD. When you're mobbin' around pedal to the floor, "spirited driving", etc..., the system is already set for AWD, but the mechanical pumping action is what actually engages the lock up for AWD, therby making it a "reactive system". That's how gen 1 & 2 Haldex works. Gen 3 onwards used an entirely electric pump system, meaning through software the system can be, or is, tuned to be "proactive" so AWD could be locked up, or "pre tensioned" before wheel spin. All depends on the software parameters. To this day, as best I know, Audi/VW has only used gen 1 & 4 systems. Mechanical(ish) or electric, which is better? Each have their pro's and con's, but my 03 BEA powered TT's AWD is fantastic, so much so it does it's job seamlessly and I still haven't needed to replace my Haldex pump yet, ....unlike many people with gen 4 Haldex cars. BTW, not trying to rip on Charles. He's great and this was an absolutely great tear down video (speaking as a former long term Audi/VW tech myself). Just typing out a long winded ramble to answer your question.

@rolandm9750 3 года назад

Didn't you guys have to do courses all the time? I'm guessing the VAG line on how to repair these was to "replace Haldex coupling" entirely? Either that or you never saw one fail apart from electronics/pump? Anyway yeah the newer ones are very similar, they've changed some of the operation in terms of pumps, etc. but the main principle is the same. It has actually been continually simplified over the years with 4th gen doing away with the mechanical pump, and 5th gen doing away with the accumulator, netting a smaller and lighter package over the years. At the same time the electronics and integration with other systems (ESP/TC/ABS and driver inputs like steering & throttle) have improved quite a bit netting significantly improved real-world vehicle performance.

@rolandm9750 3 года назад

@@colinwie9192 VAG used Gen2 in later PQ34 cars with quattro/4motion (e.g. Mk4 .:R32, Mk1 TT, A3) as well as early PQ35 cars (Mk2 A3 & TT 3.2L VR6/Mk5 .:R32); later PQ35 cars got Gen4 Haldex, starting around MY09 (in Can/US) including A3, TT, and Mk6 .:R. B6 Passat/CC being PQ46 follows a similar timeline. MQB cars have Gen5 couplings and much more integrated electronics than previous iterations. Gen4 in the PQ35 cars never integrated ESP & steering functions (it did on other brands and the capability is there, VAG just didn't implement it). There weren't many problems with 4th gen couplings, the problems were more on the early MQB cars with 5th gen Haldex. 5th gen has no accumulator so arguably the electric pump has a higher duty cycle or higher demand on it, which could have led to the failures though this is just speculation on my part. Mk8 Golf R has what I *believe* would be Gen6, though it may just be a highly customised system with a Gen5 coupling at heart, not entirely sure. The one gen they never used was Gen3 because this was specific to Land Rover. Saab also had a customised Saab-only version in their XWD system, which nobody else ever used.

@thePeterpumpkin68 Год назад

@@colinwie9192and a very informative ramble. Thanks.

@Paulie_franga 9 месяцев назад

😂@@thePeterpumpkin68

@scottibass 3 года назад

Amazing how much pressure a snap ring can take!

@emilianofloridia4445 3 года назад

Try with dry ice blasting. It's not cheap but the best result, and good content for the channel. Greetings from Argentina!

@tm199100 3 года назад

Came here to say that..

@desertwind16v 3 года назад

I just saw a video of a Porsche getting this treatment on its undercarriage today! Pretty insane results.

@thegrimreaper7777 3 года назад

DIY with Soda Blasting, (Bicarbonate of Soda from a Farm Supply store) in a blasting pot gun, just sleeve down the pickup tube so you don't turn your driveway (DO NOT DO IT INDOORS) into a winter wonderland in a second. Wash soda off with warm water.

@carlosdorantes9884 3 года назад

Coc melon

@TURBOBEATZZZ 3 года назад

Beat me to it lol!😄

@300DBenz 3 года назад

I’ve smelled PLENTY of things worse than old diff fluid: Smokers’ cars that had so much tar build up, the windows looked like they were tinted. Burnt up automatic transmissions. A car that had 2 dead cats in the spare tire well.

@jamesmedina2062 3 года назад

OMG!!! 😂😂😂😂😂👌

@HumbleMechanic 3 года назад

The smokers thing I’ve seen too. Ugh!!!!

@brendanconnelly1835 3 года назад

Worst smell is the trash compactor at a supermarket nothing like rotting meat and vegetables getting baked by the summer sun.

@aaronhall7740 3 года назад

Diff oil that's mixed with water, or reduction hub oil the same is pretty foul!

@pczapp827 3 года назад

@@brendanconnelly1835 Went to a farm on a 4H trip & they had a huge barn of Turkey's,don't suggest you expose yourself to that unless your a farmer growing them,stay with a Turkey Club at a Diner. The Fish Market in San Fran was too much for me also.

@labradormcgraw 3 года назад

LMAO at the cursing! I'm glad it's not just me who does that.

@HumbleMechanic 3 года назад

It continued for a while after the camera was off

@labradormcgraw 3 года назад

@@HumbleMechanic Yes, I can imagine. lol

@stephenprice7502 3 года назад

Super cool to see this video. That was a bit of an "oops" moment, but at least you managed to get another. I remember having to press half shafts for a Jaguar XF out so I could replace bearings. No forgotten snap rings, just seized tapers. 40T press failed to shift them. Ended up taking them to an heavy goods service centre who failed to press them out with & 15OT press. They had to take them round to the big boy toy and that registered 265T before the shafts finally broke taper. The bang was super loud.

@robt8042 3 года назад

That's insane. I wonder how the Jaguar dealer does that job?

@cumbob 3 года назад

@@robt8042 they sell you new assemblies of it's that stuck lol

@martinkominek6712 3 года назад

Have you tried hamer it from the side while pressing? Usualy works if its not too stuck.

@Hawk7886 3 года назад

@@robt8042 That's an easy conversation: "Hello, Mr. Customer? Your axles are corroded and seized and our shop press is unable to get them separated. We'll have to order new ones." If it's not a personal project and I don't have a bunch of time authorized to dick around with giant shop presses, I'm not gonna waste a bunch of time on that noise.

@SplicesAndCelluloid 3 года назад

Past Charles: "I'm nervous about this part" Little does he know...

@davidcerven5072 3 года назад

18:35 Is that clutch replacement kit for fulltime AWD still made ? If yes, where I can buy it ?

@AdamShaiken 3 года назад

Heated pressure washer with a citrus based solvent for cleaning the case.

@ChristopherBristol 3 года назад

yea I was gonna say similar, strong citrus cleaner with a high pressure steamer.

@miketeeveedub5779 3 года назад

Great video Charles! I like how the Haldex is basically an eletronically-controlled dirt bike wet-clutch assembly mated to a differential housing. I also like how the actual differential is separated from the ring/pinion gear drive via an input shaft. MUCH easier to set up then lets say a LSD on a ford 9" or a GM 10/12 bolt, but a bit more difficult to get to those same internals. The one bit of advice I'd like to add is: the secret to long Haldex diff/clutch life is to change the Haldex and diff gear fluid on a regular basis. Every 20 or 30K. The Haldex fluid isn't cheap, but it's cheaper then replacing the ECM, pump and pressure switch. Ask me how I know that! 😢 💸💸💸 Love your content bro! Cheers!

@InnovationDiscoveries 3 года назад

Can you make a video explaining how having different tire compounds from 2 different manufacturers could affect the reliability of the AWD system.

@HumbleMechanic 3 года назад

SOLID topic! .

@MikkoRantalainen 3 года назад

I would say the tire compound doesn't affect the AWD system if the tire radius is the same. The system is probably designed to have front and rear wheels rotating at the same speed while driving straight. If rear and front wheels have different sizes, the center diff will be active all the time (or in cars where haldex replaces the center diff, the haldex discs are slipping all the time) which will introduce extra heat and wear. If your center diff if torsen type, it could be damaged by the heat, too. The different tire compound should affect the rear and front tires wearing at different speeds and causing different radius forcing the center diff to always be active.

@ptspyder 3 года назад

Depends what you mean by reliability of the awd system. If you're talking traction, compound would have a huge impact. If you mean mechanical component longevity, that wouldn't really be impacted much aside from a huge power build with extra sticky rubber driven by a total bell end breaking things.

@europerformance 3 года назад

Sodablasting is a great way to clean it up without damaging anything

@andrewgonyou9903 2 года назад

never been super big on euro stuff, but I have to admit the threaded holes to press the parts apart is pretty genius

@jameswalsh3040 3 года назад

Dry Ice blast it to get it looking new - wont have to take anything apart!!!

@te71se 3 года назад

So where is the centre differential? or does the haldex clutch pack kinda just account for the slight differential in speed between the front and rear axles under turning or other conditions? also may have missed it, but where the hell does the whole unit actually get drive from the transmission itself??

@acefighterpilot 3 года назад

The transmission has a bevel box on the front right axle. Therefore, the Haldex unit only ever receives the drive torque provided to the front axle. It does slip to prevent binding.

@burzheru 3 года назад

@@acefighterpilot this is false.. if you know how this system works, you know that the rear gets its drive directly from the front diff. not the right axle as you say. that would make no sense what so ever if it did :). if you lock the haldex clutches and remove the front axeles then you can have rwd :) (altho it cannot handle all the torque and explode the angledrive)

@ne2i 3 года назад

This system is amazing. Its actually smart enough to shut itself off when the unit is low on oil. I had a Audi TT quattro that had a non working rear diff. I just changed the filter and oil and it came back to life.

@Honda-te2gq 3 года назад

If the haldex clutch plates were replaced with solid drive plates, wouldn't that cause the front and rear axle to bind? Your enthusiasm and energy is admirable. Thanks for sharing your knowledge.

@sparkplug1018 3 года назад

Wonder if you took the electronic parts off if you could throw the entire unit into an ultrasound cleaner? Would think it would do a pretty good job cleaning it up and as long as you got oil back in it as soon as its dry you wouldnt have any rust issues.

@MrJObajobas 3 года назад

Doesn't that guys from Italy clutch replacement cause torque bind between front and rear? I sure had it when my subaru's selenoid locked the clutches together.

@HumbleMechanic 3 года назад

That I don't know. Most the info I found is in Italian LOL

@bradj7205 3 года назад

Physics says that on dry pavement....yeah, there will be binding, the sharper the turn, the more binding you will get.

@MikkoRantalainen 3 года назад

If the Haldex replaces the center diff, yes, you'll be getting extra tire wear. Also make sure to have every tire with equal wear and equal air pressure or you'll be soon having equal wear in all tires.

@JRAZWR 3 года назад

Hey, Do you have a link to the italian guy that replaced the clutch packs to a solid piece? Or does anyone here know if someone manufacture pieces like this?

@erikbonillasanchez8849 3 года назад

18:44 I feel like we missed out on a great Haldex rant

@aayesher9400 3 года назад

Totally would watch a video from that edit. Failure modes and all that

@grand04gt 3 года назад

A friend sent me a link for dry ice cleaning and it looks like special cleaning voodoo lol they claim no harsh chemicals and safe on all surfaces, wires, electronics, and basically anything from the sounds of it. Check out the videos and maybe look into what kind of a cost they would charge for it. I did quickly look at the cost of the units (as i enjoy cleaning and having a really clean car) and they look rather expensive so its quite possible it will not be cheap but i would assume if its just that and you leave it with them and pay cash it should not be that bad

@miguelbadiola8718 3 года назад

use alumbrite aluminium cleaner, the one they use for cleanung a/c units. and pressure washer, you got a new part .

@jsr3793 3 года назад

You my friend have never smelled Newark New Jersey in the summer. Also German "engineering"

@HumbleMechanic 3 года назад

LOL

@meeterhead462 3 года назад

Jersey City Stand Up ..1&9 ..LoL

@luispadilla1675 3 года назад

Hi Charles, do you know what will happen if a get rid of the clutches and Haldex system. Either weld or have a shaft extension made. I saw a couple of online posts stating that the gearing between front and back is different. That this will make the back wheels push the front ones. ?? (drag car purpose only)

@acefighterpilot 3 года назад

You will break your drivetrain. Look at some of the other comments explaining the issue here. The clutches are there out of mechanical necessity to prevent binding.

@d2doctor 3 года назад

3d print a set of covers for all the openings, threads, etc, then you can media blast it without having to take it all apart :)

@HumbleMechanic 3 года назад

Man, THAT is a great idea!

@MIH11MI6 3 года назад

When I did my 02M gearbox rebuild I used aluminium acid cleaner (wear gloves) to wash over, use general degreaser before. Leave acid on for 15 minutes, then I washed off with water. For an extra step I then hovered a blow torch over the casing to absorb the water and it came up looking near new

@HumbleMechanic 3 года назад

The torch idea is awesome

@MIH11MI6 3 года назад

@@HumbleMechanic good luck! Can't wait to see this process all the way through

@joshuaallen2845 2 года назад

You mentioned a guy who made a solid piece to make the Haldex all time AWD, I've been looking for a piece like that for a long time and couldn't find one, do you know where I can find it?

@HumbleMechanic 2 года назад

I can’t find it either. May be worth digging the comments to see if someone found. To

@bradcarpenter1881 3 года назад

I know this comment is months after upload and likely to never be seen by anyone lol, but how does this vid only have 90k views?! This is incredible top notch gearhead content and about as professional quality as you can get from being on YT. This channel deserves way more views! Honestly I think the problem these days are that the are so many "car related" or mechanic related channels that makes it difficult for YT algorithms to properly promote the better, underrated channels. For that, I did my part and hit the like button!

@HumbleMechanic 3 года назад

I totally agree!

@rickbussel9532 3 года назад

Charles pls whatever you do don't put it back in like that..... I'll unsubscribe

@HumbleMechanic 3 года назад

Man I know it’s sad. Don’t worry it won’t go back like this. My wife spent the am with a wire wheel. So it’s better. My big thing is completely tearing it down for any kind of rehab and not being able to get a seal or something

@BWSTT 3 года назад

You have probably sorted your casing already, but if not check out how i sorted this for a customer with limited budget but big ambition for looking clean. Youll have to go to may channel, its called Audi TT Chassis restoration and engine bay tidy up

@gplusgplus2286 Год назад

Has this even been done 2 years later? Maybe I missed the video.

@adaada2555 2 года назад

What lsd is that one cause I am trying to do a rwd drift tt and I can only find front lsd

@Thaddeus.J.DeWyse 3 года назад

Awesome video!!! I always appreciate learning from you!! You helped inspire my love for Volkswagen and the VR6 engine in particular!! I own a 2002 VW Jetta with the 2.8l 24V VR6. It only has 82,000 miles but needs a whole lot of work. I don't think the previous owner really did much maintenance at all. My ultimate goal is to take the entire car apart piece by piece, clean it, then put it all back together how it came from the factory. Thanks for all the awesome content!! Cheers!!!!

@yotawilly2745 3 года назад

Hey CHARLES Who is the guy that makes that clutch delete for the halidex?

@briannovotny4146 3 года назад

Hey, not sure about any guy from Italy, but I'm from Seattle, and I have the Haldex Clutch insert he mentioned. But used them to run RWD.

@edwardmyers1746 3 года назад

the unnecessary complexity of that boggles my mind

@marcanderson1627 3 года назад

Try dry ice blasting. From what I've seen it does an amazing job.

@garthor 3 года назад

Is this from a VW mk4 AWD golf? Converting my mk3 Cabrio to AWD is something I've considered, but I have no idea what parts I'd need or how hard it would be... >_>

@HumbleMechanic 3 года назад

yes this is a MK4 R32. this is doable with what you are thinking. But it's not bolt in, it's welding floor pans.

@acefighterpilot 3 года назад

There's one in Canada, you can find it on RU-vid. The owner seems like a cool guy. Just don't go mangling a car up if you can't finish it.

@meeterhead462 3 года назад

Yup . DRY ICE is the move .... its gonna look fantastic ..And a BIGG YES to any DYI educational video ..I Love your commitment to the culture ..Thankyou ..🤓

@32krod 3 года назад

I know my miata manual trans was pretty coated. I cleaned it using purple power and some brushes over a couple days (covering the openings, and before installing new seals)

@burns985 7 месяцев назад

Is there a way that you can modify haldex to put more power at the rear? Im building an S3 8L for hillclimb and wondering how i can do that. You think front & rear LSD will help ? Thanks a lot

@-redtango 3 года назад

Man I want to see an all time four wheel drive R32

@moe5046 3 года назад

AWESOME, you got your engineering degree Keep up the great vids.i love watching you fix vw's ....and dont worry about the c clip,it happens,just a hurdle,lol

@mobaid1278 3 года назад

When we start the engine, the engine cries for 2.2 seconds.

@RoguePlank 3 года назад

As someone who has owned 4motion and R32 mk4 Golfs for like 8 years now, and changed rear diff units and haldex controllers multiple times, this video was very traumatic for me to watch.

@texarkana3781 3 месяца назад

Hi Charles. I've a question...in the late model VW Haldex (like in my 2018 GSW 4Mo). Is there some torque transfer ALWAYS going on to the rear diff by the Haldex? or is the (stock) Haldex system works as 100% FWD most of the time under gentle/normal road driving?

@derekaanenson6604 2 месяца назад

Absolutely helpful! Love the fact that you describe how to know something is bad or what to look for throughout all your videos. By chance, where did you acquire a rebuild manual for the Gen 1? Also would be interested in the rebuild manual of an 02M. Might be swapping a bora 4motion kit into a Jetta TDI wagon. 😉 Thanks as always!

@humbertom1184 Месяц назад

I did a heldex service on 2011 tiguan. found the heldex has a filter separate than the pump. the filter got melted. I might need your help. my wheels bind still when I turn left or right. it goes dit-dit-dit skipping . anyone has some suggestions what to do. I didn't change the differential fluid. I am afraid my differential failed but I still drive the car straight as normal. I have no clue what is happening. I also did work on the intake manifold and clean the valves. guys, do not go cheap from autozone- buy original parts. I am looking forward to see your feedback.

@Amsterdam-Pranks 3 года назад

Dry ice give you the best results!! You just bast it and the dry ice will be gone in a sec

@HumbleMechanic 3 года назад

I need to deep dive this?

@Amsterdam-Pranks 3 года назад

@@HumbleMechanic sorry wat do you mean with deep dive this? www.ics-dryice.com/en/areas-of-application/automotive-industry

@darrelsmith3907 3 года назад

Would love to see a full assembly video. Always love to see how you explain things and how you show the methodical process you take to restore things

@HumbleMechanic 3 года назад

AWESOME! My parts came in today. I have some paint on the way too. HAHA couldn't leave it nasty.

@davej.6290 3 года назад

I closed all openings on mine and sandblasted it. Afterwards i gave it another blast with glas pearls to give it a smooth finish.

@davej.6290 3 года назад

@Charles: i left some picture on your fb post

@BenjaminDLopez 3 года назад

Wondering if this would help DAP with their RWD MK5 GTI drift car project series........ Specifically, the part mentioned at 18:03...... ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ECPi1jMxNAA.html Also, to respond to your conclusion question.... I have no need for a DIY I'm just a fan w/a MK5 GTI and a dream of it being a beautiful project :'( but your videos certainly do help pass the time and really help me understand the inner workings of the engineering. DIY would probably be very helpful down line for some one.

@ellis2311 2 года назад

So if Haldex is a public company, i truly wonder how this years model differ from Volvos of the same year. I love Volvos so i know Haldex 3, Haldex 4, Haldex 5 etc. but i never heard you say a number. Did VW/Audi only use Haldex for a short span while Volvo made a life long Bond with the brand? HMM........ I just would like to know if VW/Audi got a better unit or did they all make the same for that years AWD.

@Fixxer82 3 года назад

Hey, just a quick question... All the WV engine systems and driveline ect. Does it apply to skodas? I have a 2016 Skoda Octavia 1.8 tsi 4x4 6dsg. It's a car from Norway, so if I'm not mistaken, it is a ea888 gen 3 engine with direct injection and port injection? Do I need to be concerned about the severe carbon buildup that is in the only DI engines? @humblemechanic

@ryanscott4237 3 года назад

As mentioned by by others, Dry Ice Media Blast.

@miamirice6840 5 месяцев назад

really appreciate your videos. i am happy to say years after owning a great MK5 (the return of the GTI)…..i just picked up a mk7.5

@kawilifezx10r23 3 года назад

The Haldex on my a3 8v is making grinding noises while driving and sounds bad when the car slows down to a stop. Audi haldex/rear differential $2,600 and $3,400 installed. It's a 2015 with 80k miles on it and has had all services as required smh. Been looking all week for less expensive options. Any help anyone?Had an independent audi/vw inspect and tell me that's what was wrong. There was some shavings in the haldex oil. Maybe I'll try and do a haldex service and see what happens.

@Ahmad-tx5dr 2 года назад

Hello Charles, I have done full service and oil changes for engine, dsg, axle rear and front for my mkv R32. I expected the service make my r32 solid and safety but its not. After three days service (unlucky day) on early moving i heard some noise from rear. Im not able to realize which noise is it, thats on and off sound. When i turn i heard noise again but more loud. Unfortunately i continue my driving. Then after i did light acceleration, Hard knocking heard from rear, the knocking in same time impact on motion. Then i stop at side way, looked at bottom, i seen oil of diff fell on road. Now,it on ram. Diff was cracked and fracture line. Now im still thinking what the potential causes. Appreciate on your advise. Thank You, Ahmad.

@keith.goes.racing3865 2 года назад

@humblemechnaic - For my Audi TT track car's off season, I'm going to be adding an LSD both front and rear as well as rebuilding my Haldex with new clutches, pump motor, etc. It would be great to see a DIY on reassembly! If you'd be interested in doing the videos with my parts let me know.

@tonylopes8175 3 года назад

Hello Charles, first of all I want to thank you for all the awesome things you show us. I also like to add that your not an idiot for what you did, its all in a days work, I do that all the time that's how we learn sometimes. I hope I learn from my mistakes, anyway awesome job. Those who do will eventually brake something and learn, those who don't will never learn anything lol.

@magiclydelicious1 3 года назад

Ive smelt trans fluid burnt so bad you could smell it from 30 yards away. If you where close it would burn your throat. Swapping the trans was a nightmare because of the smell. Cousin delivered mail and newspapers drove about 600 miles a night, hydroplaned doing 80 miles an hour, did 2 360's, wound up in oncoming traffic, trans was toast afterwards. She never matainenced the car ever.🤣🤣

@LastHumansGarage 2 года назад

Can't wait to watch this for the full 24:49 and learn more about my AWD.

@LastHumansGarage 2 года назад

so im doing my haldex fluid and pump screen tonight, i dont plan to disconnect the pump wire. Shouldnt be too hard to replace those o-rings with the pump balancing on the axle or exhaust somehow?

@spinnetti 3 года назад

Seems like it wouldn't make enough power to justify a rear LSD. Even with 400hp I never feel like I'm not getting the power down. A bit of slippage in first and second, but they are all slipping...

@emanuelepolli219 2 года назад

Ottimo video. Io ho cambiato sempre l’olio ma non ho mai tolto la pompa haldex, a 85000 km ha smesso di funzionare, quando l’ho sfilata dalla sua sede ho trovato tantissimo sporco simile a gelatina. Ho una audi A3 di 150 ps. La manutenzione ufficiale audi non prevede lo stacco della pompa per pulizia, scarichiamo e immettiamo olio nuovo, questo é quanto richiesto. Non capisco il motivo, forse é per cambiare più spesso la pompa? E mi chiedo se quella gelatina in zona filtro là si trova anche nel gruppo frizioni e questo mi preoccupa...

@parkercustoms870 3 года назад

Yes, please make a detailed install video.... I'm trying to do an AWD 6spd conversion on my mk6.5 Jetta and want to know what I'm getting into before I have a million pieces scattered.....🤣

@shelbymccaul6505 3 года назад

Although I have first hand experience changing gear oil on a 175,000 Audi Allroad that almost lead to my eviction from my wife, I work in a hospital and I guarantee there are worse smells. Haha. Wrenching has never had me throw up in my mouth.

@djdurban3294 2 года назад

Modifying the clutch pack to give permanent AWD is pointless by the way. The system is designed to divert torque to the rear wheels only when needed. The benefit of this system over all others is that it can allow the vehicle to operate as FWD most of the time which reduces rolling resistance thus improving fuel economy. It is actually detrimental to drive the rear wheels at high speed when the front wheels are otherwise not slipping. The controller progressively backs off the torque split the faster you go. The ATB/LSD you fitted however is definitely a good mod for a performance vehicle.

@ketillundsrensen6167 3 года назад

So i guess that there are a clutch pack with better friction plate and more of them like there is on Motorcycles. It's a normal upgrade on MX machines. That combined with the LSD diff and front LSD dig should give you a lot more traction to the wheels. And yes a install video would be nice. It's always nice to have youtube to show you how to do stuff. I have saved a ton of money and time by watching RU-vid to finde and repare faults.

@briancradicsandiego5254 2 года назад

I know that I am kinda late on this one, but about the cleaning of the casing. the price is dropping pretty fast on those laser cleaners. A 2000 watt machine is going for between 13,000. to 15,000 right now. Just an idea.

@ABFCUT 2 года назад

Excellent presentation as always !!! I have a question regarding the permanent engagement insert you mentioned from an Italian guy. As far as I know, the prop shaft spins continuously as long as the engine works since it transfers the power from the gearbox in front, before the clutch. That, in my understanding implies that the rear wheels have to spin too, regardless of any gear engaged or not. Is that so? Would you elaborate please?

@mrvv8337 3 года назад

This rear 4wd unit seems awfully complicated compared to my rear diff in my Honda Element...Hey why am I watching this???

@lostcar2312 3 года назад

I put 75w-90 in rear diff (not haldex) but is chattering when full lock steering. Does this required lsd oil additive to work?

@ericp.9497 3 года назад

I’m familiar with Chevy 10-bolt diffs. At about the 5 minute mark I thought, “What science fiction is this!?”

@TurboGinster 3 года назад

Where are you sourcing new o-rings, haldex clutch plates, and other gen 1 haldex goodies? Working on going through the diff I have for my MK3 conversion.

@donooetomo5213 2 года назад

AMAZING .. MADE IN GERMANY AMAZING .. VW-GROUP DAS AUTO POWERFULL HIGH-TECH TIADA LAWAN THE BEST

@keith.goes.racing3865 2 года назад

After reassembling my Haldex, I have a drip of fluid coming from underneath the Haldex Prop shaft. Is there a seal on the front side of the Haldex? AKA @15:57 the drum with the splined shaft passes through the Haldex "face" with the oil passages. Is there a seal that rides on that shaft?

@rnldmanuel88 3 года назад

hey charles i got a issue with my mk5 jetta 2.0t fsi i sent you a message on facebook would really appreciate any advice thanks. its got a very lumpy idle issue . pcv valve, cam follower , injectors , purge valve have all been replaced but the issue still exists.

@InternalPrimate06 3 года назад

Hi, my Audi tt quattro has awd all the time. I have chaged the control unit couple of times with the filter and oil. When I remove the haldex fuse there is obviously only fwd with no noise coming up from the rear. Any suggestions anyone?

@stonewp Год назад

How do you separate the CV axle shaft flanges from the diff flanges? I’ve already removed the 6 bolts on each cv.

@1firstjoker Год назад

worst smell in the world.... either have ur dog eat the trimmings after the blacksmith been re-shoing your horse or open a can of Surströming! :D

@marianmarian1821 2 года назад

Hi, if the Haldex breaks, will the car only be able to run with front-wheel drive? It is the Opel Antara. Thanks!

@kyleb5518 3 года назад

Haldex is simple, you put your money and faith into the car, you find the foggiest wiff of snow, bang nothing happens fwd. honestly fuck haldex not gonna buy a faux 4x4 again

@Embermist69 3 года назад

As usual, when one does not listen to their gut, bad things can and do happen. 😑 That's going to leave a mark in the brain for a bit. Anywho thanks for the video and best of luck on the project Charles. 🙂

@shirolupizoblivion1834 3 года назад

In south africa we have chemicals called aluminum brightner. Its an acid type chemical Spray on 20 min later rinse with water and boom.. brand new

@jeremys.4423 3 года назад

A testament to the strength of snap rings everywhere

@josipkardum5196 8 месяцев назад

Hi, is it possible to repair the Haldex clutch on the Fiat Panda 169 4x4 2011?

@Vertignasse82 2 года назад

I have a 2.5i Impreza but am tempted to buy a slightly used SportWagen AWD here in Canada.

@sypernova6969 3 года назад

maybe simply put some engine cleanrer on it, let it sit, and pressure wash. and if you have leftover stuff, mayeb a little media blasting, like nuts husks or something not too aggressive? Maybe glass beads?