Quote:
Originally Posted by 59safaricat
The o-ring could be partially damaged and have enough line pressure to get the car moving but not enough for proper operation. It's worth a try.
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Apparently you have never rebuilt one of these transmissions.
It doesn't work that way.
A gauge connected to the line pressure tap will confirm what the line pressure is and if you have line rise when you stab the throttle.
I just rebuilt a 56 Cadillac transmission with a defective pump and it had 35 PSI of line and shifted fine.