Th400 550hp recipe

Transmission to Rear-end

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mdabbott2009
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Th400 550hp recipe

Post by mdabbott2009 » Sat Oct 08, 2016 8:08 pm

Can anyone tell me parts wise what would be absolutely needed in this rebuild?

Speedbump
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Re: Th400 550hp recipe

Post by Speedbump » Sun Oct 09, 2016 4:46 pm

My old S/G car weighed 2,500 lbs and went 9.40,s using a stock internals TH-400 with the exception of the red clutches and a trans brake valve body. IIRC, you can get an extra clutch in the directs if you use selective steels and some patience. I may have had to do some slight machining to the hub/plate assy for the extra clutch, but it's doable with stock parts.
Speedbump
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