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Discussion Starter · #1 ·
Fresh rebuild of a 74 & 75 to make a good one.

Typical basic mods: Drilled #9, and did the Pump mod with a plug.

Tranny spins up fine, but only has 60psi.
Remove the vacume and it holds the psi at 60... no change, why?

It shifts early. However manual shifting it work fine.

<U>Please post any ideas.</U> How do I increase pressure? Or what do I check. (looking at a stuck spring in the valve body?)



THANKS for the help! (This isn't the tranny I showed with the AOD cluthces, that is the next build)
 

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You have to increase the spring pressure on the main pressure regulator to increase pressure.
Stock pressure is considerably higher than 60 psi - where are you measuring the pressure?
 

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Discussion Starter · #3 ·
Thanks for the help

Pulled the spring from another VB, and cleaned with hole with scotchbite. Now works great!
 
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