1963 Pontiac Catalina Boston CL

[Ralph Spears]

https://boston.craigslist.org/nos/ct...896937378.html

[PeteLeathersac]

‘

Thanks for posting, looks like a nice deal.

~ Pete

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[66cayne]

He's almost giving it away.

[olredalert]

----What 3-speed automatic trans would a 63 Pontiac have?....Bill S

[Ralph Spears]

Roto- Hydramatic transmission

[Ralph Spears]

https://springfieldtoboston.com/1963...ac-grand-prix/

[Keith Seymore]

Originally Posted by olredalert

----What 3 speed automatic trans would a 63 Pontiac have?

Originally Posted by Ralph Spears

Roto- Hydramatic transmission

Also known as the "Slim Jim" trans.

It uses a flex plate rather than a torque converter, coupled with a "super low" first gear, then regular first, second and third.

I pulled mine out and replaced with a TH400 from a '67 Buick Riviera.

K

[olredalert]

Originally Posted by Keith Seymore

Also known as the "Slim Jim" trans.

It uses a flex plate rather than a torque converter, coupled with a "super low" first gear, then regular first, second and third.

I pulled mine out and replaced with a TH400 from a '67 Buick Riviera.

K

----Thanks, Keith! I kept remembering the Slim Jim as a 4-speed. I also remember that performance oriented guys distanced themselves from them. Way, way back, I had a pretty cool 62 GP with the S-J trans and didn't keep it long!....Bill S