1966 Tempest custom 326 with a TH400 tranny - Pontiac GTO Forum
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post #1 of 3 (permalink) Old 05-19-2018, 05:47 PM Thread Starter
 
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1966 Tempest custom 326 with a TH400 tranny

Hello all. I have 1966 Tempest custom with a 326 2 bbl. I was just wanting to know if I could use a th400 transmission with it or if the th350 would be better?
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post #2 of 3 (permalink) Old 05-19-2018, 07:43 PM
 
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Originally Posted by Btree View Post
Hello all. I have 1966 Tempest custom with a 326 2 bbl. I was just wanting to know if I could use a th400 transmission with it or if the th350 would be better?
You don't need the TH400. The TH350 uses up less horsepower. I would add a shift improver kit to firm up the shifts and leave it at that.
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post #3 of 3 (permalink) Old 05-19-2018, 08:22 PM Thread Starter
 
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Ok great. I will end up doing that. Thanks for the information
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions.

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