Gear Install Jeep wrangler (yukon 4.88 gear) 

I'm a Millwright by trade and deal with a lot of bearing and gears. I've never changed gears in a rear end but I'm about to tackle this project on my Jk. Some things that I would have done is marked my bearing caps with a punch. I want them to go back on the same side along with the same vertical position. There's two bearings on the carrier that should have been changed. The metal chunks missing from your gears are most likely in those bearings. You didn't remove the outer races from the pinion bearings. You didn't change the driveshaft seals and it looks like you had a whole lotta gear oil in the axle when you removed it. This could have been the cause of failure because you were low on oil due to it leaking by the seals. I personally would have used a rubber mallet to seat the ring gear after tightening the bolts and then torquing those bolts after I hit it with the mallet. I would suggest putting the carrier in a vise and torquing before going back in the Jeep. I would think that torquing after you checked clearances would change some of your measurements. Maybe not by much, but it could seeing that you didn't seat the ring gear with a mallet and it could have pulled in a couple of thousands. These are just my observations from working with bearings/gears on pumps and gearboxes. I just feel like this video could be setting some individuals up for failure, but I've never done a rear end, so maybe I'm wrong.

Your video is fantastic and informative. No music is the key . That's actually what makes it Great . Showing an actual install without a bunch of background noise (music ) It teaches and great to follow . I'm retired and not that I think I could do an install but nice to follow the how to process of course. Thank you sir!

Thank you for posting such a usable video. Takes all the mystery and guess work out of installing a gear set. very informative. Thank you!

Very well done install

Great video. Very well detailed DIY.

Great video! Thank you for the step by step.

Good job at explaining everything

Amazing video great job.. muchas gracias.

those hole are there to run a bolt in so it can be pushed apart

This is so incredibly helpful, thank you!!

Excellent Video ThankYou

Learning a lot . Thanks .

My mans bare foot!! Awesome job guys nice video!!

Cousin Moose has a surprisingly gentle touch around that work area. Outstanding

BY FAR, this is the best video ive found on the internet, thanks a lot guys, maybe a little bit more explanation on how to determine its a good fit while testing shims and tolerances but everything else amazing

Dammit! I wish I found this video a few weeks ago. My rig is in the shop now being done. Very nice vid!! Will try my hand at this on my next rig. ;) Keep up the great work!

I like the breathing in the background. Helps me realize how heavy these parts can be.

Good video, about to do a gear change on our jeep.

Excelente video informativo e ilustrativo, era justo lo que esperaba para realizar el cambio de mis componentes en mi JK un fuerte abrazo desde Iquique-Chile

welp i now have the confidence to do the install myself and save the money exactly what i was looking for!!!

fantastic, who could dislike this? Geeze.. One thing could esplane the shims a little more but we get it.

U. Dudes pretty cool and helpful

Thanks for the good tutorial video. It was also a pretty big confidence booster for me doing this job.

Nice job. For my final ring gear torque, I took a different approach. Took my rear shaft and attached it to the wheel pointing upwards, took my carrier and stuck it on the shaft. Manually engaged the locker and then torqued each bolt. For the front carrier, I just stuck it in a vice to hold it. Whatever method works best though!

That’s a pretty cool rotor trick as long I guess as you don’t have drum brakes on an older model.

Love the video!!! Just an FYI but I would put a tire under the Jeep for added safety.

Hope your marked those bearing caps to know which way they went back on

How does one get cool ass neighbors like you guys? I'd so kick down a few cases of beer each for your help on my TJ. Thanks for the vid.

8:08 lmao the chills that went down my spine... like scraping a fork on a plate

Great video buddy boosted my confidence lol My question is to you is your locker light turns on and off when you want to engage your lockers

Hi wouldn’t you want to replace the pinion bearing RACES that were in the housing? Did I miss that step?

Great video....question...was the gear ratio already 4.88....it obviously was or you would have had to do the front right ?

Thanks a bunch of the tip on freezer and over. Took two tries but the second time it went just like in your video.

Thanks for making this video. Very informational on how to take apart a Dana44 JK gear box. A couple of questions: Did you check/change the pinion bearing races while you were doing this install? I also agree with the bearing preload comment, it's important to check that with a torque gauge.

Did you change the carrier bearings?

Love this video! What is the roof rack on the war pig?

Would this procedure work for 97 TJ? I want to upgrade gears to compensate for 33" tires.

But you haven't checked with pinion preload torque gauge which tells you are the pinion bearings proper torqued with locking nut while turning with gauge the pinion nut; too loose and the bearing cones will jumping and eat bearings again, too strong and bearings will be too hot. Then you check the preload together with crown gear with torque gauge are the crown gear bearings properly tight. Then you check back lash with gauge and then you put paint compound. When you check with preload gauge all bolts has to be tighten with recommended torque. When you check preload torque always rotate gears few times to let the cones in bearings sit properly on their surface and then measure preload torque.

So, did you torque the ring gear bolts one day after you put thread locker on them? I think that by doing that you didn't give it the correct torque, don't you think? Also to remove the seal from the diff you used tools that could damage the lip of the diff where the seal sits, and thus cause oil leaks, when you could have removed the seal after the spur gear, apart from that I really liked the video and learned a lot of him, thanks for that

The shims you use come whit the kit off yukon gear?

remove the lower drain bolt first so the vacuum holds the oil in.

Great vid guys, a couple things tho..1- just an fyi it's very rare but some diff ring and pinions are timed maybe you can make a vid describing them , 2- did you pre lube bearings before final install? ,3- if you used the new crush sleeve you guys should go through the procedure on how to properly crush the sleeve and measure breakaway torque for your pinion preload. Other than that nice work guys .I love that diff cover too lol.ooh yeah I didn't see you guys changing pinion race lol.

did I miss a step between where you removed the rear diff cover and you using the rotor to bang the axle out? you removed the brake caliper, reversed the rotor and bam, axle comes out... what was holding the axle in? c-clips in the rear end?

Few things I see so far , you say u do finial torque to ring gear bolts after its all installed, only problem with that I see is your thread locker has dried or almost completely dry and when u do final torque your breaking the thread locker loose and it no longer does its job , wrap it in few rags even b4 new bearings put in a vice and get the torque done b4 thread locker dries. Also wood block or brass to chase your shims and a dead blow to whip carrier in place. Also looks like you had little more than recommended back lash , wasnt quite turning the carrier enough, you can see the dial indicator move past 6 or 7 thou or whichever u said a couple times which makes me believe it had little extra back lash , you don't have to be so gentle with turning carrier you actually wanna hear it stop and turn it and hear it stop again , it won't move the pinion but there will b higher back lash # 👍 If I'm wrong about anything I've said please explain. Thanks

Were the bearing cups replaced? I don't recall see that.

Did you swap the front gears to match ratio?

So it’s possible with a weekend mechanic you guys think? Just got a quote for install only and pushing 2200 for labor.

I don't think I could find a shop around me that would do it this way with the oven and everything LOL.

LOVE THE MUSCLE SHIRT WITH ZERO MUSCLE MASS....HELL YEAH MAN

When you were using the rotor as a slide hammer the jeep was rocking. I was thinking "Is this his last video?"

I Like the vid. I just don't think I should do it myself. I don't have the shop or tools but I could buy them. I want to do this soo bad though but I want it done right. Guess I'll wait for a 4x4 club guy to help. A shop isn't going to clean everything the way I will but they will have the exp so I still think I'll have the shop do it. Dam.

Why choose 4.88? What year, trans, and size tires are you running?

Warpig great video! That being said... you and your cousin want to make some extra Christmas money? Video or not...I'm not mechanically inclined enough to do this. Same as you. Yukon 4.88 But mine are sitting in boxes. Lol

Great video. Encourages me to do this myself on my 2008 JK. Just a couple questions....I presume if any of the measurements are off, Yukon instructions will tell you what shims to use to correct the errors. And I assume you already had 4.88 gears on the front? Without trying to show my stupidity, I assume they have to be the same in the front and the back. Thanks for your feedback.

What gears were in it before?

Awesome! Thank you for this video. If all goes well, you will save me $700 in labor.

Seal puller for seal great investment

What height jack stands do you recommend? I have a 2005 Jeep Unlimited LJ on 35s and I'm not sure what height to buy.

In the vid I noticed a string hanging out while you were installing the pumpkin .was string attached to a block too hold the plunger out ?

What did you use to hold the locker switch open? I see the string hanging there, but it is hard to tell for certain what you have holding it.

How did you get them to sponsor you?

💯

Super video but i have question.What is the sensor you left inside on the top right side what this sensor do.

pinion drag spec?

👍👌

whats the ratio for DANA 44 i have 4.10 Thanks

how did you measure the pinion depth?

So I can put a different gear ratio in the back and leave the front stock?? It will be great...

Holy crap 135ft lbs for ring gear bolts And there's spider gears in a rear Rubicon locker ? 🤔

Hiw did you get the old bearings off you never showed that.

So at the start you show they play on the drive shaft, how much play do you have on the drive shaft after install? I hear thump noise on mine, between gears, (manual trans) doesn't feel right

How do you like the 4:88’s?

31:28, only 2' apart and texting each other 😂

I'm assuming he use the same shims that were in it from the factory. I wish they would have collaborated if it wasn't in spect what to do shim wise and it didn't show how to set the crush sleeve those are the most important things

what do i do if i dont have extra bearings?

That's not cousin Cole, that's cousin Moose. I've got one too!

so you didn't change the front at all? I thought if you did the back you have to do the front, if you plan on engaging the 4x4.... correct me if I'm wrong

THAT wire! ...ugh....lol....... the video jumps right past tightening the bolt and then the next frame the wire is done. How does it come out/go in?

You guys anywhere near Dallas Texas ?

Well its not done yet. After regear your check engine light will turn on. Then your JK will get into limp mode and stuck on 3rd gear. Also A/T temp light will turn on. Why dont u guys also give us tutorial how to setting TCM modul. This Junk JK has very sensitive computer, doesnt tolerate any change even in minor modification.

sawdust

War Pig !!! ABSOFUCKINGLUTELY GREAT VIDEO !!!!! INSTANT SUBSCRIBER..... THANKS

Be careful !! Don't kill the Mushroom.

Endplay??😅

Well, there's one thing I'll never be doing ,,,

"War Pig..." I can't roll my eyes hard enough. #square

What year? What motor? What transmission? Why 4.88's? All would have been very informative. For the sponsor, Why Yukon? What is a complete set? What is included? Why should I buy it?

The gear went out because its a jeep.

Yukon gears suck a$$ …..I don’t even off road and I blew to sets in 8 months not a good product….pop metal garbage.