65cutty

I have a stock rear end housing in my 65 cutlass with an eaton posi unit and richman 355 ring and pinon, will a 65 oldsmobile cutlass 308 ring and pinon bolt up to the eaton ? and or a 65 buick gs 293 open bolt up to my eaton am trying to make the car for long road trips and the 355 has the engine pulling about 3000 r's at 65 mph

monzaz

2.56-2.78 2 series carrier
2.93 3.08 3.23 3 series
3.36 3.55 3.73 3.90 4.10 4.33 and beyond 4 series

You can take a 2 or a 3 series and step up to a steeper gear BUT you can not go backwards on the carriers if you have a eaton that is a 3.36 and steeper 4 series unit and you can only use the 3.36 3.55 3.73 3.90 etc.

YIU can do a 3.08 from a chevy 8.2 on the eaton and then you will also need a sleeve kit for the chevy yoke because the chevy gears are 25 spline yoke where as the pontiac pinion is 27 spline.

I sell the sleeve kit if you need and the rest but that is up to you. Hope I did not depress you with the info but that is the deal. Jim

J D Race

gearheads78

keep the 3.55 and go overdrive

2blu442

I'm with Richard on this one.....

But if you do decide to change,

Jim, would the guts from a 1965 Buick GS 2.93 posi fit in his housing?

1965Cutty, shipping the whole rear end would be a killer for costs, but if the internals would interchange maybe we could swap those? In another thread you mentioned you'd be willing to trade the 3.55 gears for highway gears. I've got a 1965 442 project car that's a 4 speed. I don't know what the gears are in its housing but I know it's not a posi. John

65cutty

am checking this weekend to see if mine is a buick or pontiac rear end, john and jim. richard am not sure what type and year of trans to look for....jim

gearheads78

2004r is the easiest swap. I just pulled one out of a 84 delta 88

65cutty

thanks richard, I'll ck around here at the local yards. do I get the torque convertor and what about the electric lock up?