Jhucks03

I’m wanting to change to a posi differential in my 71 Cutlass.

Best I can tell it’s a corporate 10-bolt (bolt-in axles).

Can anyone provide part numbers for carriers and install kits? I’ll be keeping the 3.42s I swapped in quite a while back.

Fun71

If you have 3.42 gears, a factory 410408 limited slip differential should fit. That is the casting number for a factory 2.73-up limited slip differential.

joe_padavano

The original axle in every single 1971-72 Cutlass was a Corporate 8.5" ten bolt from the factory. All Chevy 8.5" ten bolt internal parts fit.