[grparen]

Looking for an early 1957-64 Pontiac posi differential with 3.42, 3.55, or 3.73 gears.

[tom s]

Might check with Brad at Fabcraft if no one replys.FYI,I believe ratios were 3.42,3.64 and 3.90s.Also 57-58 will have 29 spline and 59-64 will be 31.Tom

[61-63]

Call Terry Siracusa with the Houston GTO club he has or has a friend who has a 4.10
'57-'64 posi for sale.

[poncho-mike]

At one time, I had a 3.64 posi out of a 62 GP 4-spd. I think it is in the barn under a bunch of other rear ends. I don't remember selling it.

I'll look next time I'm down there.

[grparen]

61-63, I have a 4.10 or 4.30 in my car now and I need a 3.42 or 3.64 for better highway driving. I thought buying the chunk with the gears already in place would be less expensive in the long run than buying the ring and pinion and installing in my unit.
Poncho-Mike, I would be very interested in the 3.64 posi chunk if you can locate it.

[61-63]

grparen you have a pm.

[DMcNulty1]

I have 2 drop out open end gears are 3.23 I believe from what I am counting

[63Banshee]

If you're coming up for Pate, we might be able to hook you up.

[lust4speed]

Question - are the drop-out pumpkins the same for posi and non-posi?

[61-63]

Originally Posted by lust4speed

Question - are the drop-out pumpkins the same for posi and non-posi?

Yes

[poncho-mike]

I was planning to go down and move more stuff out this weekend, but the weather was pretty crappy. I will be down next weekend and will look.

Mike

Originally Posted by grparen

61-63, I have a 4.10 or 4.30 in my car now and I need a 3.42 or 3.64 for better highway driving. I thought buying the chunk with the gears already in place would be less expensive in the long run than buying the ring and pinion and installing in my unit.
Poncho-Mike, I would be very interested in the 3.64 posi chunk if you can locate it.