Technical > Dan Dishon's Transmission Den

Powerglide transbrake issue

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tdracer:
I have an issue with my transbrake, i have 200 lbs pressure at the servo cover at idle.  Transbrake engages, pressure drops but only returns to 100 lbs.  Transbrake doesn't hold when i get on the converter(rolls forward) and then sticks, i need to rap the throttle a couple times to get it to release!

Any ideas? Valve body? Reverse apply piston?

Help!

Thanks

Brian

bikeguy307:
The piston may be getting stuck in the case. It sounds like a tear down is in order, to check the piston and the apply circuit. It is possible the valve is not transitioning smoothly and is sticking a little in both directions.

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