Diff crossmember bushings
Thread Starter
Holley HP EFI w/TPI
Joined: May 2009
Posts: 553
Likes: 0
From: Kanata ON
I used the aluminum pucks for 5-6 years I guess. During the frame off I had a look at them and noticed no wear marks whatsoever, meaning that the old, ugly, cracked bushings had never deflected sufficiently to allow any contact. I re-installed the crossmember with fresh paint and left the original bushings, warts and all. The pucks now make good drink coasters in the garage.
Race Director
Joined: Jul 2001
Posts: 15,892
Likes: 42
Burning Brakes
Joined: Sep 2006
Posts: 1,242
Likes: 12
From: Kalispell MT
These are the Guldstrand parts I use to locate the crossmember and the differential. They are still offered:
The two large aluminum disks locate the crossmember (above the rounded areas at the ends of the photo). The crossmember locates the differential. If there is slop, the differential can torque out of ideal alignment and induce wheel hop, etc.
The small aluminum disk replaces the front cushion and more securely mounts the differential, again to avoid twisting, wheel hop, etc.
Seems pretty straight forward to me (and Dick Guldstrand)
The two large aluminum disks locate the crossmember (above the rounded areas at the ends of the photo). The crossmember locates the differential. If there is slop, the differential can torque out of ideal alignment and induce wheel hop, etc.
The small aluminum disk replaces the front cushion and more securely mounts the differential, again to avoid twisting, wheel hop, etc.
Seems pretty straight forward to me (and Dick Guldstrand)
I've got 2 of the smaller ones with a beveled area and only 1 large flat one. Please confirm I need 2 of the large ones. Thanks
Le Mans Master
Joined: Apr 2000
Posts: 5,202
Likes: 10
From: cincinnati ohio
St. Jude Donor '09
I removed the bushings, welded 1/8" steel plates to the bottom of the xmember and bolted it up...moved the diff up about 1/2"...not to mention the god awfull sounds transmitted through the frame/rollbar 
Thread Starter
Holley HP EFI w/TPI
Joined: May 2009
Posts: 553
Likes: 0
From: Kanata ON
Racer
Joined: Jul 2010
Posts: 261
Likes: 0
From: Manahawkin NJ
Did you weld the old cups from the bushings to the plate? Any pics?
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Le Mans Master
Joined: Apr 2000
Posts: 5,202
Likes: 10
From: cincinnati ohio
St. Jude Donor '09
It's been years but I don't think so. The holes in the center of the steel plate will keep it located. Sorry no pics.
Here's a little info on page 20-21 of this pdf...
http://www.corvettefaq.com/c3/vip.pdf
Here's a little info on page 20-21 of this pdf...
http://www.corvettefaq.com/c3/vip.pdf
Last edited by yellow 72; Jan 10, 2011 at 11:11 PM.
Pro
Joined: Sep 2009
Posts: 629
Likes: 6
From: columbus ms
i wish i would have read this thread last week. i just removed my bushins and planned to replace them. they looked fine just wanted to start over fresh. the only place i have found them wanted 65 bucks a piece :o i am thinking about beating the old ones back in since they were in good shape. anyone removed the old ones and then reinstalled them?
what did you end up doing moonsteel?
what did you end up doing moonsteel?
1974, bushing, bushings, c3, c4, corvette, crossmember, diff, differential, guldstrand, rear, shifted, suspension, toms, torque
