Jump to content

e21 LSD locked up, what to do?

2 posts / 392 viewsLast Reply

Recommended Posts

Back story: Bought a 73 shell awhile back that had a rebuilt e21 LSD installed. Unfortunately when they installed it they neglected to fill it with diff oil. As I was pulling the car home the wheels Locked up in freeway traffic. Finally pulled the diff today and as expected no fluid inside.

The gears look ok (to a diff newb at least), and they wiggle a bit when turning the input flange. The Output flanges are seized, will not turn at all.

Is there anything that can be done to save this diff? Partial rebuild? Full Rebuild? Something simpler?

Video launches by clicking picture below. Please let me know if you need more pictures / info to help diagnose. Thanks in advance!


Share this post

Link to post
Share on other sites


Tear it apart, of course. The side- case bearings are easy to replace, and if

you keep the shims with the covers and on the proper sides, you usually don't

even have to re- shim it.

When it's apart, examine the gears more carefully. Since it was being

towed, they're PROBABLY ok, and any damage would be

on the coast side anyhow.

The next victim will probably be the pinion bearing set. They're not too hard

to replace either, but getting the preload right with the crush sleeve, seal, slinger

etc is a bit more fussy. Still not bad, though.

The good news is that no matter what, the spool should be OK- and that's

the unique part.

Good luck,


Share this post

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.