ISO. Pinion Seal replacement instructions.

[ObnoxiousGt]

Looking for instructions , PDF, step-by-step, etc.. about replacing my pinion seal myself. I've done numerous things on my car myself , but for some reason I'm not as confident with this.lol.
I've searched numerous threads on here but just cant find the answers I'm looking for.

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[WD Pro]

PM me your email - I have a pdf for rebuilding the diff that might help

WD

 

[ObnoxiousGt]

PM me your email - I have a pdf for rebuilding the diff that might help

WD

PM sent

 

[Bahndvr]

Can I get in on this?

 

[K4fxd]

Just remove the drive shaft, jack up car, check and write down breakaway torque, remove the pinion nut, pull off yoke, pry out old seal, seat new seal, install yoke install pinion nut, torque to same break away as before, install driveshaft

 

[Some Random Guy]

Just remove the drive shaft, jack up car, check and write down breakaway torque, remove the pinion nut, pull off yoke, pry out old seal, seat new seal, install yoke install pinion nut, torque to same break away as before, install driveshaft

I recommend counting threads too before removing. Extra insurance to avoid preload issues. My experience is not from the Ford though, so may be irrelevant.

 

[ORRadtech]

I recommend counting threads too before removing. Extra insurance to avoid preload issues. My experience is not from the Ford though, so may be irrelevant.

Some of the things I've read suggest using a center punch to index the nut and count threads to return it to the exact point. Seems like you don't have to use a torque wrench with this method.
Never done it though, only read about it so take it for what it's worth...

 

[Some Random Guy]

Some of the things I've read suggest using a center punch to index the nut and count threads to return it to the exact point. Seems like you don't have to use a torque wrench with this method.
Never done it though, only read about it so take it for what it's worth...

I’d use the thread count as more of an extra layer of confidence, the torque value seems more definitive as long as it doesn’t get hung up early on something.

 

[Cobra Jet]

Here, granted you aren't changing rear diff gears, but just follow the instructions laid out in this pdf as far as the rear pinion seal R&R:
https://www.cjponyparts.com/skin/frontend/cj-pony/default/images/install-pdf/install_m4851m8a.pdf

 

[Bahndvr]

What concerns me is the "staking of the pinion nut"
So the current pinion nut is staked, if so then I'll need a new nut?

 

[Some Random Guy]

What concerns me is the "staking of the pinion nut"
So the current pinion nut is staked, if so then I'll need a new nut?

Yes.
All differentials I’ve done the pinion nut is 1-time use.

 

[JohnVallo]

Looking for instructions , PDF, step-by-step, etc.. about replacing my pinion seal myself. I've done numerous things on my car myself , but for some reason I'm not as confident with this.lol.
I've searched numerous threads on here but just cant find the answers I'm looking for.

There are some tips in here (under pinion bearing/crush sleeve section) that may help you.
Inside the "Super 8.8" Rear End | 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt, Mach 1) - Mustang6G.com

As far as Instructions for just a pinion seal job, here are the best instructions I have found -from Ford-
View attachment FORDINSTSHTM-4851-M8A.PDF

 

[Bahndvr]

Wow very insightful. I'm just trying to replace a leaking pinion seal. I don't mind doing it, I just want to know what all I need to replace and tools to accomplish. Thanks

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