Pinion Seal Replacement - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 1 Old 06-15-2012, 08:07 PM Thread Starter
Compression Ignition Addict
DrewGerhan's Avatar
Join Date: Oct 2010
Location: Athens and Cleveland, OH
Posts: 226
Thanks: 2
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Pinion Seal Replacement

Just did the rear pinion seal on my truck tonight and even though I forgot to take pictures, I figure I could do a write up to help some people out.

First off, mark everything with a paint marker or Sharpie. The rear part of the driveshaft has to come out so mark all the mating points so it goes back together how it came apart. Also, mark the pinion, pinion nut and yoke on the differential so these line up correctly too. Everything needs to go back how it came apart so it is in balance.

After that, remove the driveshaft by unbolting the two u-joint retaining caps at each end. They are 8 mm. I replaced the u-joints while doing this since it was already out and didn't take much longer to do.

After that is out of the way, spray a liberal amount of PB Blaster on the pinion nut. Let it sit and then take the nut off while holding the yoke in place. I used a 1 1/8"(I think) socket and a pipe wrench. Once off, use a 2-jaw gear puller to remove the yoke.

When the yoke is removed, some fluid will drip out. Be sure to have a suitable container under it to catch the fluid. With the yoke out of the way, take your favorite screw driver or seal puller to remove the old seal. Once done, put the new seal in by tapping carefully around the edge of it until it is completely seated.

Once that is in, everything is just reversed. Make sure everything is good and tight. I put anti-seize on the pinion nut and lock tite on the u-joint bolts. Torque all bolts down to factory specs and check the fluid level in the differential. I decided to drain mine and fill with Mobil 1 to have some peace of mind.

Obviously this is meant to be a guide and I take no responsibility for what you do to your vehicle. Take all safety precautions before, during and after working on your vehicle.

E99 7.3L ECLB 4x4
140,000 miles
4" lift on 33s
6637 Filter
5" Diamond Eye
PHP Phoenix
Quad Gauge Pod
05-07 Headlights
DDM 55w 10,000K HIDs
800w Pioneer amp and 10" Kicker sub
Avital 5303 Remote Start and Alarm
DrewGerhan is offline  
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome