12 bolt rearend leak - Off-Road Forums & Discussion Groups
GM Standard SFA Trucks & SUV's All discussion of full sized Solid Front Axle Trucks, SUV's to include Suburban

LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 10-25-2003, 12:11 PM
Posts: n/a
12 bolt rearend leak

my 84 12 bolt rearend is leaking a lot. its coming from the diff cover seal and in the front by the yoke. how do you fix the leak at the yoke. it looks like its coming from the light colores plastic thing coming out and around the yoke. how do i put a new one on? thanks
Sponsored Links
post #2 of (permalink) Old 10-26-2003, 01:58 AM
Join Date: Oct 2003
Posts: 135
Thanks: 0
Thanked 0 Times in 0 Posts
Re: 12 bolt rearend leak

sounds like a pinon seal leak, un bolt you drive shaft, thares a larg nut in the center of your yoke take it off it should be pritey tight you may need some one to hold the brakes whale you bust it loose with a large braker bar or a strong impact then pull the yoke off ay need to pry a litel or tap it off with a hamer then just pop the seal out put the new one in and put it back together, just renember to get the yoke nut tight may need someone on the brakes agen

hope that helps [img]images/graemlins/scs.gif[/img]
vitl2002 is offline  
post #3 of (permalink) Old 10-26-2003, 10:11 AM
Posts: n/a
Re: 12 bolt rearend leak

so i take off the drive shaft and unbolt the yoke then just pull really hard on it? then i pull the plastic bushing out and put in a new one? isnt the yoke connected to the gear, wont it get massed up if im pulling really hard on it.
Sponsored Links
post #4 of (permalink) Old 10-26-2003, 01:07 PM
Carpal \'Tunnel
wrath's Avatar
Join Date: Nov 2001
Location: Waukesha, WI
Posts: 3,323
Thanks: 0
Thanked 1 Time in 1 Post
Re: 12 bolt rearend leak

Mark the pinion and nut with a ***** punch. Count threads. Yank the nut, washer, and yoke. Replace seal. Put the yoke, washer, and nut back on. Tighten the nut down until it is just barely past the mark you made with the ***** punch.

Ideally, you want to check the pinion bearing preload but that involves a lot of work.

Don't forget to mark which universal cap went into which part of the yoke. Be careful when removing the old pinion seal, you don't want to damage the sealing surface on the pinion shaft.
wrath is offline  
post #5 of (permalink) Old 10-26-2003, 03:37 PM
Posts: n/a
Re: 12 bolt rearend leak

ok thanks that info was very helpfull. i just jacked up the front end of my car and noticed the driver side wheel has some vertical slop. im assuming its the wheelbearing. passenger side is fine. how do i go about repairing this? how serious is it? my stering box also has a little play in it. the steering wheel can moove about and inch and a half before the gears in the box get tight on it(not running). its not the steering wheel shaft i can see the rag joint rotating, all the play is inside the box. do i need to get a new one. it really makes going straight a pain. i end up meandering down the lane. its not fun when im tired.
Sponsored Links

Quick Reply

Register Now

In order to be able to post messages on the Off-Road Forums & Discussion Groups 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:


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

Posting Rules  
You may not post new threads
You may not 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