Haldex is a joke. All those overcomplicated assemblies, to achieve what the Japanese have been doing for decades with less parts. Euro cars take this L
FANTASTIC! Thanks for taking the time to explain this, my buddy's R32 has been making a whine on higher speed downshifting and spirited driving conditions, we're going to tear it apart and fix it but this helped in researching quite a bit. You should consider doing another similar to this one on the new electronic differential installed in the MK7 Autobahn GTI. As far as I know this electronic component is new to VW and only placed in a few production cars at this time. I worry about that part being the weak link as I buy parts to tune to beyond 300HP
I have a 2010 Saab 9-3 XWD with Haldex Gen 4. Have not driven it in snow yet, but can’t wait to see how it responds. I just purchased the service kit, to change fluid and filter before winter. Never had cross wheel drive before!
Actually, it was Gen III that added the electric pump for precharging the accumulator. Gen III was as fast as Gen IV in reaction time to front wheel slip (15 degrees), and was proactive as well, not just using front wheel slip to activate the rear wheels. The difference between III and IV was that IV eliminated the mechanical pump, and used an electric pump exclusively, while III had both an electric pump and a mechanical pump.
@@aydenu9057 It only eliminated changing the filter from VAG dealers' service schedules. Meanwhile, Haldex 4 and the current Haldex 5 pumps have been failing because of clogged paper cartridge filters in the former and clogged gauze strainers in the latter. I had the gauze strainer in the Haldex 5 in one of our cars cleaned at 20k miles. It was not a pretty sight.
My go to channel to explain to customers how their car works and what upgrades they should be doing rather than the ones they have heard about online Thanks for your help and advice on the subject
I have an 2007 octavia scout with a haldex awd system. Its ideal for my needs. I'm happy with the fwd economy most of the time with the added security of awd when it snows or when I take it off road, which isn't as rare as it should be. For me it's the best of both worlds. I get decent off road ability in a car and dont have to feel like a total bell end driving a 'proper' 4x4 all the time and have the woeful fuel economy that comes with it.
Absolute awesome, i love all this engineering talk, this is my kind of high, engineering technology, I've said for years, the germans are the best in the world in engineering technology.
It is very easy to tell if Audi or VW has central differential or Haldex: cars with longitude engines has drive train with central diff f.i. Torsen; cars with transverse engines are equipped with Haldex.
Any recommendations on mechanics (not the dealer) in NJ and surrounding areas that are experienced in Haldex on MK1: Here is where I am at: 1. Replaced the control unit with a used unit. 2. Got the dreadful code, sporadic mechanical clutch failure. 3. Replaced the ground strap/earth wire and tested the functioning of the rear wheels.. they spun on the lift and not under load. 4. Finally got the pump replaced and tested in the rain the other day. Just front wheels spinning. 5. We did the VCDS test on the Haldex system and all was ok. No codes at all. 6. Traction control light goes on when I got on the car.. ABS breaks tested/AWD System test and no codes. Tried getting the wheels to spin with out EPC activated with no luck either. Is there anything else this awesome community can tell me what to look for before I get under the car myself and replace the whole rear drive of the car with another used unit? 163K on 2002 ALMS EDITION and don't think car is worth more than 4k.. Sucks to be attached to a fun car!
Can you alter the yaw sensors threashold, e.g. Yaw angle or Yaw rate to allow the car to rotate on a racetrack w/o sending all the torque to the front? This idea might be similar to Focus's RS design.
Thx. Good work with the graphics. Have you ever got to the bottom of the gunk noted by some people when they change the fluid? Some people see it & some don't. What is it? Why does VW not even mention cleaning it at fluid-changes?
4:02 there is no pump powered by the drive shaft in gen1, its electric. You can upgrade the gen1 controller to lock the clutch based on throttle position. There is also a mechanical insert plug to lock it 50:50. Aftermarket LSD available to front and rear. On stock form it's quite bad and introduces understeer easily
avainola I was also surprised when Paul said that because I had a gen 1 TT and it had a pump on it plus à filter the only model that have no pump was the syncro system In mk2 and 3 cars I thought that there was a version of Haldex that we never saw here in North America i Guess not. About the filter situation on the first few years or the production of the Tiguan there is a filter but it's not available at the dealer what I have seen is they tend to leak oil at the filter cover I bought some filter kit from ECS tuning I don't know if Paul has them available they are genuine Haldex parts they are not cheap but way cheaper than a new differentials.
Paul - I have 2 Haldex equipped MK7's - Alltrack and R (both 2017's). The alltrack feels much more FWD than the R - not sure if it's because it's tuned differently, or just other factors. Are there any significant differences in the way the two AWD systems function?
Yup it's basically how it's tuned, Alltrack won't be travelling at high speed offroad so the system has enough time to react when the tires start slipping, so it will stay FWD most of the time, the R on the other hand need to be stable at high speed so it will throw power to the back and adjust more of the time and even before it starts to slip making it use the rear wheel more. Hope this helps
Could you please possibly tell me if the haldex drive shaft on a mk7 golf r runs through the main clutch at the engine. If not I will run more power to the rear to ease the strain on the main clutch as it slips,
Hi Paul..I have one problem with my audi s3 8p1 2008..i have give up my car in lifter..I have make the second gear inside and the front wheels is working and the big pipe front front to rear diff..but my rear wheels dont working..I haved chance the oil and filter from haldex system..and the pumpe is working I hear it..what do you think..have a another problem or the system start the work only when the car is in street..and he start from 0kmh or from 10-20kmh
do you know how to connect the rear differential haldex wiring ?? I need plug it into a GTI mk5. because I have a differential of a vw mk6 R 2012.but I don't know how to connect the haldex.
I have a 2010 TTS that feels like it is driving from the rear under normal driving. It also wears out the rear tyres faster than the front. I cannot find any data on the % split for the TTS.
Hi and thanks for the info! What happens if the pump is dead? the vehicle becomes front wheel drive and thats all? Is there any damage to the haldex if the pump is dead? Could you post the part number for the haldex pump gen 5? I have the following error: 16671 - Pump for Haldex Clutch C1112 04 [008] - Internal System Fault Thank you!
I'm confused a little bit doesn't the 4th gen work with EDL too? Pre 2013 Skoda Yeti 4x4's have 4th gen Haldex and they have EDL according to the manual.
What will happend if you customize haldex drivetrain on mid engine car like the MR2, transvers mounted engine and gearbox on the rear axle and the haldex system sending power to the front wheels.
Does 4 Motion rear diff make any noises like an old air conditioner’s refrigerator system kicking in? I just got an MY20 Allspace in Australia (normal Tiguan in US) and noticed the noise at low rpm in D1-D3 but now all throughout the gears especially around 2000rpm - on accelerating gradually makes the noise more obvious but it fades away once the car is travelling at high speeds probably due to engine noise. It’s my first 4 Motion VAG car. The noise happens on accelerating in a straight line or more easily duplicated after going over the speed hump, gradually accelerating. Dealer (salesman) gave me a courtesy call on the day of pickup to tell me that it may be the humming noise from 4 Motion rear diff. Is that likely? It’s not intrusive and all of my passengers don’t notice it at all. My other drive is MK6 GTI and compared to that this Allspace makes a lot of ticking and clicking noises on downshifting as well - probably due to being quieter?
thanks for share this video of haldex, i ve the 2008 mk5 r32, can i use redlne oil GL5 75W90 on the haldex? or only recommended using the original haldex oil. any chance to use another haldex fluid, because the vw oil is expensive...thanks a lot. lawrence
sorry, due to friction clutch was developed along with the oil, so there is only one choice: statoil 12-301, now it is owned by FUCHSwww.rimmerbros.co.uk/Item--i-LR054941if you are in China, I can send u some.
With a gen 5 haldex on a audi a3 quattro I'm having a rumbling on the rear end..fuse out to shut pump down no noise..question is are the rear axles doing anything different when haldex is engaging and sending power to the rear wheels vs when the car is acting as front wheel drive or when the fuse is out shutting the pump down..the cars already had a new pump and rear diff. Put in and didn't help
I have a 2003 Volvo S60 AWD. I think that second gen Haldex. This may be a stupid question, but here it goes. When the car is on a lift, only the front wheels are spinning. My AWD is not working, is it?
so... I have an 2000 audi tt quattro... i believe it is a 02y transmission. Can anyone tell me if the haldex ecu is standalone on this model or is it integrated in with the man engine ecu?
It sounds like he was describing XDS with the ABS brake and EDL mode working to slow the spinning wheel down. that's not how i understand VAQ works as it clearly states the Performance Package model of the GTI actually has an electronically controlled limited slip diff... it seems there really still isn't that much info on exactly how the VAQ diff works, when is it actually engaged ie. only in turns or if it's engaged at launch, whether it's still engaged with ESC mode fully disabled. i'd love to find this info out if anyone knows more about the subject.
I have a 8V S3 and the recommended Haldex oil change is every 3 years regardless of mileage. Is that oil the only thing required? No filters or special tools (as you've mentioned)? Is it easily accessible?
Is there a Haldex Gen4 or Gen5 model that controls not only front/rear axle power split BUT ALSO leftrear/rightrear split? I mean the torque vectoring between leftrear and rightrear is not done by the brake but done by haldex clutch. I know Saab 9-3 Turbo X's Gen4 Haldex has it. How about other models?
Not possible, as in impossible. Of course, if you remove the front axles and substitute other hubs you'll have RWD but the ECM won't allow the clutches to close. You would need to mechanically lock the prop shafts to the rear diff. Good luck doing that. Even if, you'll have a dash that looks like a Xmas tree.
the 2017 S3 is said to have an upgrade AWD system where it can send more than 50% power to the rear wheels. On the audi website it also says it has the quattro system. So 1) is the S3 not AWD all the time? and 2) if not, is there a way to keep the rear diff from decoupling?
Zareh Shahinian its mechanically impossible to send more than 50% to the rear wheels without the front wheels actually slipping. All 4 wheels on the same quality road surface and 50:50 is as rear biased as this setup physically allows.
Yes it can, the traction control will kick in and can cut power to front wheels, hence rear wheels have all the power. Audi is stretching it, but they say the S3, RS3 and TTRS can do this. mk7.5 R as well.
Mmm I have 2.0tdi 4motion and if I drive easy back just working 20% if I stuck or in the snow and pushing then yes I have for front and back 100% so what do you trying to say???
@@ClanOgilby wait.. you think new cars are better? 🤣🤣 haldex is gash full stop but new cars are utterly attrocious and so unreliable its biblical. I think the best thing to do is not buy VAG but If you must, then stay well away from Haldex junk.
What about Volvo, same? I want to convert my FWD 2002 V70 to AWD if I can find a wrecked XC70 with a complete setup. Will probably want to rebuild/service some of the driveline components. Could you point me toward any applicable resources for AWD swaps on P2 chassis Volvos?
honestguy77 ! Have not started it... however V70s and XC70s have the exact same unibody throughout all generations... only trim DC ifferences. Volvo fits both the exhaust and the driveshaft in the same shallow tunnel on all P2 AWD setups afaik. The challenge is the DEM differential electronic module, getting it to work with a non-native system.
@@reallyhappenings5597 Have you checked VolvoSpeed.com & SwedeSpeed.com? I'm converting my C30 to AWD. What we (myself and other C30 owners) are trying to come up with is a 'standalone' Haldex controller similar to what GTIforum users have done
That year A4 has Thorsen and not Haldex, that's the only way it can have drive split 60/40 rear/front, it's an amazing system, worked great in my S4 (plus sport rear diff with torque vectoring) I prefer it to the Haldex system for sure.
So couldn't you theoretically flat tow a manual Golf R if you put it in neutral? I know the manuals say you can't flat tow any VW but theoretically I'd think you could
