I have two pinion seal leaks, well not leaks more like the fluid is just seeping and the diffs are damp. I need to replace them but are unsure how to do this, is there a how to write up or video anywhere that someone can point me to? Also sometimes when I accelerate from a stop I hear a clunk in the rear, it is only when I take off from a stop, could this be my pinion bearing going bad?

 

Bearings fail then take out the seal, check for wobbly yokes.

 

Do I have to drop driveshafts to check for yoke wobble?

 

I would, it's 4 bolts.

 

Alright. I am replacing o2 sensors tomorrow so I will do that real quick too. Thank you.

 

I haven't gotten to replacing my pinion seals just yet but soon, I was reading that I need to measure torque on the yoke nut before taking it off so I can reinstall it properly? Or do I just reinstall the nut and torque it down to spec? I was reading about a crush collar?

 

There is a crush sleeve on the rear 8.25 and 35 I believe. The 30 doesn't have one. I would just tightly snug the yoke back up and not just run it on with an impact or anything that would cause pinion preload to go up.