Remove/Replace GM 246 transfer case, 2000 Chev Suburban

Подписаться 61 тыс.

Просмотров 735 тыс.

50% 1

A step by step video showing how I diagnosed, removed and partially tore down a damaged GM 246 (NP246) transfer case on a Chev 2000 Suburban 4X4 with the 4L60-E automatic transmission. The video shows details of removal and installation of the case, though full rebuild details are not shown.
For the best 246D disassembly I've ever seen, don't forget to watch this one:
• 246 GM Transfer case t...
For an excellent demonstration of the rebuild in a 261HD, go to the demonstration by Eric O, here
• New Process Gear 261HD...
Other videos showing the full rebuild are linked in the discussion thread.
If you decide to inspect your vehicle while in drive with rear wheels spinning, be wary for your personal safety, since sudden loss of life or limb may be only inches away.
This video is posted for entertainment purposes and is not an instructional guide. Do not attempt this at home without professional advice. I am not a professional mechanic, and any misadventure resulting from your attempt to repair your vehicle is your responsibility.

Авто/Мото

Опубликовано:

2 июл 2024

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист

Посмотреть позже

Комментарии : 444

@spelunkerd 7 лет назад

For those looking for more detail as to how to do the next step of a full rebuild, there are now a couple of excellent video sets that go into this in detail. The best one I've found so far is by Eric O at South Main Auto, here. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ccWhhgLZ20k.html Also don't miss the video linking to Briansmobile1's video, linked in the comment thread, below. An older set was done by Rickafix, here ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-R-LsFpQkn5M.html. Also just today I discovered an excellent demonstration of how to press in the seals and bearings, here ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-w4Wv7sw5nLs.html. Good luck!

@danielbates9347 3 года назад

O9k

@bernocastro4310 3 года назад

978

@rletzgus 12 лет назад

It's great that there are guys like you taking the time to video all this work. So that people like myself, DIYer's, can do these kinds of jobs. Again, thank you!

@calebpozsik2816 11 лет назад

I had to drop my NPG 246-NP8 transfer case so I studied your video and found it extremely useful. Now, I have a 2004 GMC Sierra so my transfer case is a little different but it really helped none the less. Thanks for posting a worthwhile video.

@petecoots 5 месяцев назад

Have a 2001 GMC Yukon 5.3L- been battling the 4WD Service light going on 2 years now. I've tried changing the switch module, TCCM, front diff actuator, oversized fuses and lastly a fluid change out. Will sometimes switch into 4HI, but then the 4WD Service light comes back on and the fuse is popped. I finally got my hands on a used 246 t-case with all the numbers/codes that seem to line up. Great step-by-step procedure- was taking better notes than I ever did in any classroom! Also appreciate the spline count- going to check to make sure they are the same. Before I tear into it tomorrow! Thanks for your assistance

@stumblein9 8 лет назад

that's the exact same noise i hear on my 2001 silverado. i notice it at low speeds, sounds like running over a beer can. so many shops have told me different things...gravel in my tires (lol!), u-joints..etc. finally a shop told me its the transfer case. told me the chain is stripped and shaft is worn. wants to do an overhaul. this video made me feel better. thanks!

@semicrazy.neverlazy 6 месяцев назад

That's exactly what I said when I watched the first part of this video!

@Duststorm72 11 лет назад

this video is so helpful..i just got my transmission rebuilt...but wen i drove slow in a parking lot with the windows down i heard that noise...same clicking/grinding noise...i thought it was hard to take off and get it fixed....but thanks this vid...i feel more confiedant..and will be even cheaper to take off and put back on my self..save me money on labor...very helpfull..thanks for the video..

@jasonjones313jj 8 лет назад

I like this video a lot. So many other videos were so full of blabber and fluff. You were straight to the point and hit all the critical points. Thanks again and I thumbs you up.

@spelunkerd 8 лет назад

+Jason Jones Thanks!

@spelunkerd 12 лет назад

Those are wise remarks. Yes, we repaired the seal leaking at the transfer case side. No more leaking since then, though I didn't do anything to the transmission end. I'll continue to watch that to the future. Thanks for your contribution!

@TattereDX 11 лет назад

Thanks for putting up. After tearing into the the locking hubs and even opening the pumpkin to see if any gears were broken, I'm wishing I would've done this to see if the transfer case was shot first, which it is. New to 4x4's and learning the hard way to get things fixed. 1982 GMC 1/2 ton K1500.

@RShakes 10 лет назад

Thank you for posting this video! I'm in the process of replacing the transfer case on my 2000 Chevy Silverado 1500 z71 and this definitely helped. I'm most likely going to go to a junkyard and pick one up off a wrecked vehicle and use that on my truck to save some cost.

@spelunkerd 10 лет назад

Good luck!

@diesel2421 3 года назад

this is definitely me right now. excellent video. thanks for diagnosing my sounds...

@filstoy 11 лет назад

And you were correct to do that. That's what they are called in the actual GM service and parts info. Also, thanks for taking the time to make this video. I usually like to do rebuilds myself but the cost of some of the special tools almost makes it a moot point . On mine the Kent-Moore puller for the rear output bushing is $400 alone. I lucked out and found a used one on ebay for $35 but sometimes it's cheaper to take it to a shop once you get it out.

@OregonBigfootODA 9 лет назад

I am about to replace the NP246 on my 1999 Suburban and decided to get a rebuilt one on eBay for $729 with free shipping and no core charge. It is completely rebuilt: seals, bearings, chain, clutches, steels, pump and etc. As well as an upgraded rear case half. I couldn't justify doing it any other way.. Will be installing it this weekend. :-) Thanx for the good removal tips!

@EddiCurrent 7 лет назад

Great video spelunkerd, you and others here on RU-vid inspired me to not only rebuild my own NP246 TC, but to produce a few videos on the modifications I did as well as the assembly. After getting mine apart it was quite obvious these things were poorly designed and require some modifications to keep them from wearing themselves out prematurely.

@spelunkerd 7 лет назад

Great, I'll have a look. Anybody who cares enough to give back to the RU-vid community by recording experience is OK in my books. Thanks for stopping by to glance at my humble effort, which could easily be eclipsed by somebody who takes the rebuild right through to completion. I drove this car today, it was certainly worth the effort I put in.

@noahvarca 8 лет назад

Great video, very informative, great camera clarity and placement. First automotive video I have no complaints about.

@spelunkerd 8 лет назад

+Noah Arca Thank you.

@spelunkerd 11 лет назад

For anybody reading this and considering a DIY rebuild, you will want to watch Rickafix1 do it without a lot of fancy tools. Great series!

@wkl747 12 лет назад

You are very good communicator as well as technical skill. I learned a lot from you. You are very talented and good on financial justification. Great video.

@feverz28 10 лет назад

Thanks for the video. I got the transfer case out in 1 1/2 hours, went very smooth, now to open it up and see where the problems are at. I was quoted $1000 to trade my core for a rebuilt one which doesn't seem too bad. I don't need my truck for a while so i will mull it over and see what i end up doing. Thanks again.

@g00se770 12 лет назад

Great video --I am right in the middle of removal / replacing my GM 246 transfer case ---wish I had seen your video before I started!

@jimmywells33 2 года назад

Who were the idiots that downvoted this?! Thanks for a great no-nonsense video.

@spelunkerd 10 лет назад

Thanks for posting your experience here, it will help those who visit in the future.

@CooganBear Год назад

Thank you for the informative video. Still very useful in 2022. I'm driving a 2001 Yukon XL. No issues yet, but this is good info.

@lancelot1953 10 лет назад

Thank you very much for taking the time and effort to put this video together and share your experience/expertise. I found it very helpful, Ciao, L

@spelunkerd 10 лет назад

Thanks!

@mecheng81 6 лет назад

Great and thorough video, thank you for posting.

@spelunkerd 11 лет назад

Thanks for documenting your experience. It's not easy to examine the system safely without a lift.

@imnotviolent 12 лет назад

thank you for putting this video up.im changing the transfer case myself on my 99 yukon,this video helped me out so much.saved me prob$ 1500 thanks again man.

@spelunkerd 11 лет назад

And thank you back, for watching and participating.

@spelunkerd 11 лет назад

Oh, I'm glad you recorded your experience for the thread here. When I removed the encoder motor (while the case was on the bench) it came off perfectly, and putting it back on was easy too. But maybe in your case it needed more wiggling that wasn't possible in the confines of the vehicle frame. Nothing beats hands-on experience! Thanks again for your contribution.

@mcamp2013 11 лет назад

I will be using your video as a guide. Very thorough. Thanks for posting it.

@spelunkerd 12 лет назад

Thanks for your input! For others who may be considering doing a case swap, they should know that there is added complexity if the diameter and the number of splines on the input and output shafts differ from the original case. Of course even if there is a problem, it's not insurmountable, just more work.

@vanstechcorral 5 месяцев назад

I attach the sliding ears on the trans jack from the bottom so the surface on the pan is smooth and they can be tightened and adjusted while supporting the trans weight. This is the correct way as the bolts are only long enough to remain flush. For the transfer case what is needed is a welded jig that supports it on the jack. It sure is tough getting it back up working alone as brother to the worm!

@SignatureMind 3 года назад

Very Wise!!! Very WISE INFORMATION!!! Thank you! I feel very confident for my task. God Bless!!!

@thejnelson88 11 лет назад

Thanks, it does give me hope, I got the the tcase later in the day and once all the prep work was done and getting it under the truck it ate a lot of my time. I'll be giving it another shot in the morning. It just means I need to play with it some more to get it to go into place. Thanks for the advice.

@craigshiman1442 8 лет назад

Thank you so much. This has been a very helpful & instructional video. Thanks again

@spelunkerd 8 лет назад

You're welcome, I'm glad it helped.

@Turbo231 12 лет назад

That is a very neat video. Your truck is in very nice shape with very little rust to battle. I had front axle issues on my S-10 and I was unable to record it's repair but after watching you, wish I had. The 4x4 system on these trucks (S-10's being similar in design) is quite a beast but there are tricks to figuring out what's going wrong. I ended up setting the whole truck up on jack stands (with the front suspension loaded) to figure out the issues between 2 and 4 wheel drive.

@spelunkerd 12 лет назад

I'm glad it helped, thanks for the feedback.

@spelunkerd 12 лет назад

I'm sure that many of those who read the comments will find your remarks helpful. Thanks again for your insightful contributions.

@tjoyce81 8 лет назад

This is a great video - thanks and it has taken some anxiety out of my future tcase removal. I am going to try a rebuild myself, and to address the issue of leaks caused by holes - the fluid pump housing on these tcases wears a hole into the case over time. The best fix is to replace the pump housing with an improved housing...

@spelunkerd 8 лет назад

+Tom Joyce Sounds like fun. You should do a video, ha ha. Thanks for watching!

@FBIsurveillance62 7 лет назад

Wow what an amazing video break down all the information you really know how to make a RU-vid video that's for sure thank you so much for all your help really made it a hell of a lot easier wish you the best hope all is well

@spelunkerd 7 лет назад

Oh, I'm glad it helped. I wish I could have done the full rebuild, but there are other videos out there showing better detail regarding that step. Thanks for watching!

@feverz28 11 лет назад

Thanks for putting the time into doing this video. I need a rebuild on my 01 Silverado without auto lock transmission. I figure it should be similar, just hope there is a way to salvage some of the transfer case. My truck was was at a jolting / grinding point and had it towed home.

@gordoncombine 11 лет назад

Very good and informative video. Thank you for taking the time to walk a guy (or girl. lol) through a transfer case job!

@fototropism 9 лет назад

i really appreciated the clip so thank you so much for posting

@spelunkerd 9 лет назад

Nicholas Desrochers Thanks!

@dreamer2355 12 лет назад

Awesome video! It was well worth the watch!

@ianmcclelland9773 11 лет назад

Thanks... I really appreciate and enjoy your videos!

@spelunkerd 12 лет назад

@JScottRacing I'm glad it helped. Maybe you'll be lucky and it will be a universal joint rather than the case. Helping guys like you is my way of giving back, for all the help I've received from others here on youtube. Thanks for your comment. Dave

@spelunkerd 12 лет назад

@dreamer2355 I really appreciate the complement, especially knowing you work in the industry. Thanks again for all of your insightful contributions on Ericthecarguy's forum. Dave

@paulhaines5755 5 лет назад

Rebuilding these yourself is pretty easy. No special tools, really. In addition to bearings and seals, definitely replace tail housing and slip yoke to rear driveline if you've ever run it low on fluid. Likely some wear there that you may or may not see in both slip yoke and tail housing bushing. I found that getting them out is not a challenge but getting them back in is a bit. It's easier if you install the extension housing by itself with one, easy access bolt hand tight to the back of the tranny. You then bring the case in underneath the vehicle 90 degrees rotated then raise it and spin it into position. Get it close to the tranny shaft and take the bolt out of the extension housing. Install the extension housing on the transfer case at this time. You can spin the transfer case to easily gain access to all nuts. Now, slip the whole thing into place and install extension housing bolts. Easy money!

@spelunkerd 5 лет назад

Thanks for an insightful note that will help many others who stop by.

@spelunkerd 11 лет назад

Yes, I'm told that is normal and your explanation is what I was thinking.

@harryperry4328 10 лет назад

Thank you for putting this together.

@spelunkerd 10 лет назад

You're welcome, thanks for the feedback.

@jeremyskookc4726 5 лет назад

First video I've came across of yours. I love the detail. Never seen someone go into such depth. Now I know exactly how to do the job on about to take on. Thank you

@spelunkerd 11 лет назад

Thanks for your comment and the extra info. This internet thing, it's all about paying it forward. Cheers!

@spelunkerd 10 лет назад

Yeah, I understand. I wondered if it would be worth it for my vehicle, since it's old and other problems could have been coming. But it turned out to be the right decision for me -- the truck is still going strong and we use it every day. Cheers!

@spelunkerd 9 лет назад

In response to Jason Palma's question, no I didn't have pump rub, but when it was rebuilt they installed redesigned clips to prevent that. The noise was the bad output shaft bearing shown in the video, and the rebuild was done as a kit including a new chain, new seals, etc. I still drive the vehicle every day, now well over 300,000 km. Good luck to you!

@jasonpalma6209 9 лет назад

spelunkerd Thank you for the response. Ill be ordering the parts soon

@crystelmangert7623 7 лет назад

1999 S-!) BLAZER LS,.. Driver side Front C-V axle won't stay in , When I lock it in 4 wheel drive It POPS OUT! the snap ring is getting chewed up , will inner barring fix issue? Tried longer axle , No Off Road package HELP! Steve

@gregjames1423 8 лет назад

awesome in explaining ! you remind me of some cool cats I grew up with .

@spelunkerd 8 лет назад

+greg james Ha ha ha, that's so funny. I'll have to save this, to show the cool guys from high school. Only in a different universe would I be part of that crowd. Thank you for watching!

@spelunkerd 12 лет назад

Those are wise words and I agree completely. The rebuild that I had done included replacing the clips that cause erosion through the wall of the casing, though I don't know if the full rebuild form Merchant was done. In any case, it's still working fine today.

@spelunkerd 11 лет назад

Knowing how much work this is, I am not at all surprised at your bill -- it sounds very reasonable to me.

@spelunkerd 11 лет назад

I'm glad it helped, thanks.

@speubanks2250 8 лет назад

spelunkerd - thanks a bunch, you've helped me with my 2002 Tahoe. keep up the great videos & info. you are appreciated :-)

@spelunkerd 8 лет назад

+Sp Eubanks Thanks, man!

@poeburgh 11 лет назад

After doing this repair I learned a bit. First thank you for your video , it was very helpful for the most part. However taking your suggestion to remove the encoder motor was a real mistake. It is very easy to get the mating shafts out of alignment and have real difficulty getting the encoder back on. I had to remove the electric motor from the encoder gear case and manually position it to the neutral position on the transfer case( which took some doing ) So Leave the motor on!

@cornell833 Год назад

Great content 👌 #I used a regular 🚗 jack no problems sat it on the jack got it high enough work it in place 👍 higherd jack to hold in place tighten nuts up plugged my plugs up then everything worked out great 💪

@spelunkerd 11 лет назад

You're welcome, and I hope it works out for you. Don't underestimate how much work this can be, especially if you have inferior equipment such as no transmission jack or small jack stands. The case is heavy and awkward to manipulate from underneath, so there is some risk of it falling and injuring you or damaging sensitive parts. Thanks for your comment.

@spelunkerd 11 лет назад

Yes, that's the video I was referring to. It's not necessarily his problem, but it gives a good view of how to install and remove the encoder motor.

@spelunkerd 11 лет назад

Hey, thanks for your comment. Remarks from guys like yourself, with experience, make this thread more helpful for everybody.

@spelunkerd 12 лет назад

@Turbo231 Thanks for your reply, Ben. I watch all of your videos because I find them thoughtful and interesting.

@spelunkerd 10 лет назад

On mine I could feel the top one but not see it. The side ones were all easily seen. Fortunately they all were on with minimal torque, I was surprised how easily they came off. I used that ratcheting swivel box wrench that I showed in the video. It might help if you clean the area really well -- of course there is a risk to pressure washing but that might make it easier (disconnect battery). It's also a lot more comfortable to work on a clean surface when you lay underneath. Good luck!

@techgood 12 лет назад

Wow, wonderful Video, thank you very much Sir

@spelunkerd 11 лет назад

Thanks, Ian.

@internalbeats6870 10 лет назад

Great video. Thank you for your time

@glennrightsell1 10 лет назад

excellent thanks for alot of good info ,now to fix mine.

@spelunkerd 10 лет назад

Good luck. There are some more high quality youtube videos of how to do the inside revision now, much better than there was a couple of years ago.

@brandongarcia7508 3 года назад

Great video, thank you sir.. blessings

@spelunkerd 11 лет назад

As I recall there was a vent tube that just allows pressure to equalize with atmospheric air, but no vacuum line. The vent tube starts at the case and extends forward, with the forward tip held by a clip above the transmission somewhere.

@spelunkerd 12 лет назад

@techgood Your welcome, thank you back.

@rudysilva2713 5 лет назад

Amazing job.!!! Tnks for u time

@chrisgunderson4651 4 года назад

obviously degree in communications dang good job !

@andersonrowland 12 лет назад

Great video!

@redhorse554det1 12 лет назад

good vid. enjoyed yur explaning how u went about yur projct.

@tjs_welding_and_fabrication 12 лет назад

Thanks. My 98 Tahoe makes the exact same clicking noise. Time to get to work.

@spelunkerd 11 лет назад

In the video you see the output bearing at the rear shows pitting of the ballbearings. Those steel bearings were bouncing and binding in their track, causing that clacking sound. The vehicle is still working fine now, and we use it every day. I wondered if it would be worth the effort to fix such an old vehicle, but in retrospect it was clearly a good decision.

@brainsironically 10 лет назад

Great vid! Thanks.

@spelunkerd 9 лет назад

In response to the remark by faclcom alkhair with the depleted oil -- One of the commonest causes of depleted tranfer case oil with this vintage chev case is a tiny hole eroded in the wall of the case that leaks from there. So, now that oil has been replaced, watch closely for recurrent leaking from the case wall. If the case has formed a hole you need to do an overhaul on it to replace the clips that are designed to protect the inner wall of the case. I've seen people use JB weld for that, but it usually doesn't work until the clips are replaced inside.

@briansmobile1 12 лет назад

I really appreciate your professionalism in editing and eloquent dialog. Your shop also looks very nice and clean. What is that you do professionally if you don't mind my asking?

@DavidRodriguez-sv4kq 12 лет назад

Great video. Thank you.

@spelunkerd 11 лет назад

Yeah Steve, I was surprised, too. The reason I chose that terminology is that the manual I use (Alldata) uses the same word for that shaft, and I didn't want to confuse anybody by choosing a different word. It wouldn't have been my first choice otherwise (grin).

@spelunkerd 11 лет назад

The noise was definitely coming from that rear bearing. But with the case already opened it was only wise to replace the chain and also replace those metal clips that are notorious for wearing through the case and causing catastrophic failure. We replaced all the seals, not just the seal that was leaking a little at the front drive output shaft. Most of those parts come as a "minor seal kit" and so the simplest plan was to do all of that. The vehicle is still going strong today.

@dougtownley6748 6 лет назад

Thank you for the Video!

@spelunkerd 6 лет назад

You're welcome, I drove the vehicle today.

@techgood 11 лет назад

nice job, thank you for the video

@spelunkerd 11 лет назад

Yes, and after the fix that rotation continued, as you say.

@cheeese101100 7 лет назад

I know this is old but you are correct, my 1999 silverado has the same transfer case and the front driveshaft always turns on it as well (but leaks around the pinion seal too unfortunately lol)

@spelunkerd 12 лет назад

@Oldsmob455 Yeah, when the load is off center it's awkward, and lining up the bolts was time consuming. Thanks for your comment.

@spelunkerd 12 лет назад

@ObsessionMotorcycles Just a large pair of snap ring pliers. To do this, first remove all the bolts that hold the two halves of the case together, and pry the case apart 1/8". Then open the snap ring and pull the two halves apart. The snap ring stays with the rear half of the case, and the gears stay with the front half of the case. Relative to the gears, the snap ring slides to the rear of the vehicle. I wish I could have shown you this in the video, but it's hard to film.

@spelunkerd 10 лет назад

The fluid I used was what was sold and recommended to me by a GM dealer -- they use AC Delco for this.

@spelunkerd 12 лет назад

@bigalhurl That little wrench I showed made it easy -- maybe your trans mount is a little different. I couldn't see some of the nuts but I did it easily by feel, and they weren't on very tight at all.

@spelunkerd 11 лет назад

You're welcome. If you want more detail on the actual rebuild, Rickafix1 did a very detailed set of videos showing that.

@spelunkerd 11 лет назад

I don't know what the span was but I got them at a discount supply house, Princess Auto in Canada. That ring is about 6 inches in diameter, you need the largest you can find. I'm hoping somebody will do a thorough rebuild here on youtube, so that those details are clear as well. Thanks for your comment.

@ducklandwikeno 11 лет назад

Great job man I hope its still workig right . Its always a hard job to pull a trans and diferetal

@spelunkerd 11 лет назад

(part 2). To remove the stainless steel straps you can pry them apart, and if you are careful you can reuse them. I cut mine so I had to replace it. There is a special tool you use to put the strap back on -- I have the tool so it was easy for me. If you don't have the tool, I have heard of some people using those plastic quickties that work almost as well. The thing that bothers me about plastic quickties is that plastic tends to expand with heat so they may not hold as well as steel.

@spelunkerd 11 лет назад

Yeah, I regret not trying, but that was a time when I couldn't afford to mess it up, and what was available on the net was not complete enough for me to risk it. Hopefully somebody will put together a video of the part I subcontracted, passing a baton for all of us. It's still working fine. Thanks for your comment.

@spelunkerd 12 лет назад

@wishiniwasfishin27 I read about pump rub when I researched problems with this (and other) GM cases, and I was expecting to see something. But inside the case, even after 300,000 km, there was no evidence of pump rub at all. The mechanics did replace the clips with some kind of better pump support they were using, though I'm not sure it was made by Merchant. I can't say I expect very many years out of this vehicle, so we'll see.... Your input adds to this discussion, thanks!

@spelunkerd 10 лет назад

You want big snap ring pliers, and you want to loosen the bolts that hold the two cases together before trying. Then expand the snap ring and pull the two cases apart. All of a sudden it all falls apart. I think I got lucky since it happened quickly without a lot of fuss, but as you see I had giant pliers. I'm not sure I know of any other tricks. Good luck!