Jump to content

Go to solution Solved by Stevenc22,

Recommended Posts

I recently installed a remanufactured differential from Retrosuperbikes. After about a month the differential started leaking. It appears to be leaking from the lower differential cover bolts and maybe even from the drain plug (which has a new washer).


Can the cover and the rear differential support be removed without removing the differential? I thought i did a really good job sealing the differential, im surprised its leaking at the bolts.

Edited by Stevenc22
Link to comment
Share on other sites

Yeah, I think so.  If you can weasel the rear carrier bracket out, I think there's enough room.


But it's been 15 years since I tried, so I might be remembering trying, not succeeding.


Those don't often leak if you use a coat of Permatex Super Black.

I don't remember the bolt holes going into the case, so it's probably

just leaking around them.


If you used the stock gasket, THAT might have done it- I've NEVER had much luck

getting that thing to stay in place, not tear, AND seal at the same time.


Super Black for the win.  Or something else that doesn't mind oil...





Link to comment
Share on other sites


permatex ultra-black is the ticket.  make sure you do a ring around all the bolt holes.


this job will be a bitch to do with the diff in the car.  if it was me, i would just spend the extra 20 minutes and pull the diff out to do it.  out of the car you also won't need to dump the diff oil.  just set the thing on its nose (supported), pull the cover, clean the surfaces being careful not to have scrapings go into the diff and reseal.  


once you have run the bead of ultrablack, set the cover on gently, then put the bolts in just barely hand tight enough to get a little of the black oozing out the sides. then stop.  let it set for a few hours.  then tq to spec and put back in car.

Link to comment
Share on other sites

  • Solution

There really isn't room to pull the diff cover with the diff in place. I ended up dropping the diff. The seals were all dry and so i called the diff builder and he thinks he forgot to put thredlock on the through bolts and so i did the bolts and redid the cover.


Only time will tell. Thanks for the advice.

Edited by Stevenc22
Link to comment
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.
With your permission we and our partners may use precise geolocation data and identification through device scanning. You may click to consent to our and our partners’ processing as described above. Alternatively you may access more detailed information and change your preferences before consenting or to refuse consenting. Please note that some processing of your personal data may not require your consent, but you have a right to object to such processing. Your preferences will apply to this website only. You can change your preferences at any time by returning to this site or visit our privacy policy.