Diff spring bolt holes
Thread Starter
Racer
Joined: Feb 2012
Posts: 256
Likes: 30
Diff spring bolt holes
I replaced the diff in my 73 with a diff from a 66 (stamp 66 AO). My 73 diff used a 2-1/4 wide spring with big bolts for the spring mounting plate. I ordered a composite rear spring that came 2-1/4 wide with big bolt holes. Unfortunately my 66 diff has small bolt holes which I though only 78-79 used. And I thought 78-79 used a 2-1/2 wide spring. My new composite spring fits into my 66 case.and I am afraid a 2-1/2 spring will not fit. Would I be ok using the small bolts with the smaller mounting plate even though this spring came with bigger bolt?? It says it fits 63-77
Race Director
Joined: Apr 2009
Posts: 19,294
Likes: 2,753
From: Charlotte NC
The only thing I would be concerned with is that the spring fits the cover correctly...and the mounting plate fits it correctly also. Meaning I would not want the spring to have the ability to twist or rotate due to a narrow spring was installed in a cover that was made for a 2 1/2" wide spring. The size of the bolts and plate need to match what the cover will allow. If you are concerned that the bolts are smaller in diameter...then getting a new rear end cover with bigger bolts can be done if you choose.
DUB
DUB
Thread Starter
Racer
Joined: Feb 2012
Posts: 256
Likes: 30
The only thing I would be concerned with is that the spring fits the cover correctly...and the mounting plate fits it correctly also. Meaning I would not want the spring to have the ability to twist or rotate due to a narrow spring was installed in a cover that was made for a 2 1/2" wide spring. The size of the bolts and plate need to match what the cover will allow. If you are concerned that the bolts are smaller in diameter...then getting a new rear end cover with bigger bolts can be done if you choose.
DUB
DUB
