Re: TH400 to 700r4 Swap questions
I would not think that your running out of power because of the TH400. Putting in another gear will only make the truck that isnt making enough torque at that speed struggle more.
On the other hand I put a 700r4 in a k20 I have and it is fun. It took a few tries at the right governor to get the shift points right. I bought the edelbrock throttle cable/tv bracket and it works good. The tv adjustment works together w the governor in dictating shift points. You'll love the first gear and the OD is nice on the freeway. But I would work out your low end power loss first because putting in another gear will only make it more pronounced. Just my two cents
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Phil
'70 Longhorn 421 700r4 tach 4 wheel disc hydroboost daily driver
'72 short super build
4wd '72 Suburban LT4 coming soon!!
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