How much PITA is Diff crossmember
Thread Starter
Melting Slicks
Joined: Aug 2012
Posts: 3,487
Likes: 83
From: Titusville Florida
How much PITA is Diff crossmember
I need to change the diff gasket (leaking), but looking at things it looks like it's going to be a real PITA to get to the bolts on top of the diff crossmember, is there any tricks to it? Thanks for any and all tips 
Le Mans Master
Joined: Mar 2001
Posts: 6,240
Likes: 1,013
From: Watkinsville, GA and Glen Cove, NY
You will need to drop the crossmember to get to the bolts you are talking about on the rear cover. I have done it a few times and found the easiest way is to loosen the crossmember bolts and use a two jaw gear puller on the crossmember. Pull it down and let your bolts catch it. Maybe use a couple of donor bolts. If that crossmember has never been down, it will be nearly fused to those bushings. I tried pry bars of all sizes and mine wouldn't come down for anything. The puller popped it right off. Maybe not the ideal way to do it but it works.
Bill
Bill
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,335
From: North of Toronto - Ontario
Soak the "sombreros" starting today to help separate.
Long extension with "wobbler" end to get at the driveshaft u-joint
Careful of the plastic vent tube on the top. If you do remove it, remember to put it back BEFORE bolting the crossemmber back on (do not ask how I know)
Here's some good input, I've never tried the puller (I used two chisels) but several people have had luck with it
http://forums.corvetteforum.com/c3-t...l-removal.html
HIH
Mooser
Long extension with "wobbler" end to get at the driveshaft u-joint
Careful of the plastic vent tube on the top. If you do remove it, remember to put it back BEFORE bolting the crossemmber back on (do not ask how I know)
Here's some good input, I've never tried the puller (I used two chisels) but several people have had luck with it
http://forums.corvetteforum.com/c3-t...l-removal.html
HIH
Mooser
Burning Brakes
Joined: Mar 2011
Posts: 969
Likes: 1
From: NJ
You will need to drop the crossmember to get to the bolts you are talking about on the rear cover. I have done it a few times and found the easiest way is to loosen the crossmember bolts and use a two jaw gear puller on the crossmember. Pull it down and let your bolts catch it. Maybe use a couple of donor bolts. If that crossmember has never been down, it will be nearly fused to those bushings. I tried pry bars of all sizes and mine wouldn't come down for anything. The puller popped it right off. Maybe not the ideal way to do it but it works.
Bill
Bill
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Thread Starter
Melting Slicks
Joined: Aug 2012
Posts: 3,487
Likes: 83
From: Titusville Florida
Race Director
Joined: Jan 2000
Posts: 12,399
Likes: 247
From: San Jose CA
It's OK to use a gear oil meant for limited slip differentials without the GM posi additive.
Worst case, if you end up with some chatter you can put more of the additive in.
Adding another bottle or part of a bottle won't hurt anything.
Worst case, if you end up with some chatter you can put more of the additive in.
Adding another bottle or part of a bottle won't hurt anything.