Conversion U-Joint Differential
Thread Starter
Drifting
Joined: Feb 2010
Posts: 1,734
Likes: 267
From: Richmond Texas
Conversion U-Joint Differential
I've never had the original differential in my car.... has a 3.08 in it now, which I don't know what it came out of. But I have a AA Code 71-75 Corvette diff 3.55 Ratio that I want to install. From my search I need a 5-134X u-joint for the driveshaft. I'm sure someone on here has done this before so is this the right U-Joint conversion # and would there be any other issues that I would be getting myself into?
As a side note... I rebuilt the original engine awhile back and installed an L82 camshaft, it definitely lowered the bottom end torque, that's why I'm looking at putting a lower rear gear in it.
As a side note... I rebuilt the original engine awhile back and installed an L82 camshaft, it definitely lowered the bottom end torque, that's why I'm looking at putting a lower rear gear in it.
Last edited by SledgeHammer 2.0; Nov 21, 2022 at 06:56 PM.
Safety Car
Joined: Nov 2001
Posts: 4,424
Likes: 619
From: northern CA
The pumpkin in my '64 was a '68 unit with 4:11 gears. Both the driveshaft and pinion flange mated together using the smaller 1310 U joint. The 4:11 pumpkin was swapped for a '71 unit with 3:08 gears. The '71 pumpkin has the larger 1330 size pinion flange.
Mating the 1310 and 1330 sizes together is easily done using a combination U joint. That's what I used. No problems in over 30K miles.
https://www.dennysdriveshaft.com/p37...2_x.html#photo
John
Mating the 1310 and 1330 sizes together is easily done using a combination U joint. That's what I used. No problems in over 30K miles.
https://www.dennysdriveshaft.com/p37...2_x.html#photo
John
Last edited by mrg; Nov 21, 2022 at 06:54 PM.
Thread Starter
Drifting
Joined: Feb 2010
Posts: 1,734
Likes: 267
From: Richmond Texas
The pumpkin in my '64 was a '68 unit with 4:11 gears. Both the driveshaft and pinion flange mated together using the smaller 1310 U joint. The 4:11 pumpkin was swapped for a '71 unit with 3:08 gears. The '71 pumpkin has the larger 1330 size pinion flange.
Mating the 1310 and 1330 sizes together is easily done using a combination U joint. That's what I used. No problems in over 30K miles.
https://www.dennysdriveshaft.com/p37...2_x.html#photo
John
Mating the 1310 and 1330 sizes together is easily done using a combination U joint. That's what I used. No problems in over 30K miles.
https://www.dennysdriveshaft.com/p37...2_x.html#photo
John
