Quote:
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Originally Posted by olredalert
----What 3 speed automatic trans would a 63 Pontiac have?
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Quote:
Originally Posted by Ralph Spears
Roto- Hydramatic transmission
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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
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'63 LeMans Convertible
'63 Grand Prix
'65 GTO - original, unrestored, Dad was original owner, 5000 mile Royal Pontiac factory racer
'74 Chevelle - original owner, 9.56 @ 139 mph best
Last edited by Keith Seymore; 11-24-2025 at 09:48 PM.
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11-24-2025, 09:45 PM
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