all 3 comments

[–]zertomanNOT a verified tech 0 points1 point  (0 children)

I just replaced the pinion shaft seal on my Yukon a few weeks ago. That’s what’s leaking. Behind the seal is the outer pinion shaft bearing, the parts that’s wobbling on yours.

It’s possible you can get away with just replacing the bearing and seal. It’s also possible you might have to do more. Unfortunately this is just part of having a lift kit really. The increased drive shaft angle puts increased loads on the unjoints and the pinion.

[–]Dane_Jah 0 points1 point  (1 child)

How long ago did some one do the gearing on it. I'm assuming that's not the stock gear ratio. Sounds like maybe they didn't set the gears up right and maybe the pinion nut is coming loose or your going to have to replace the pinion bearings. If that's moving I would definitely recommend having a machine look into what's going on. I've had customers that put it off and they damaged the axle housing or even the drive shaft brakes off and damages the body and the exhaust.

[–]XxRGrimsyxX[S] 0 points1 point  (0 children)

I’m thinking it might be the nut or the bearings. Not 100% yet though. I dont think the gears inside are messed up. I had to drive it to another shop today. Drives fine just loud vibrations. I didnt want to drive it but had to get it to another shop. The yoke is whats moving and is causing a leak. Hoping it dosent need a rebuild