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53 Pontiac Hydra-Matic

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Hi there

I'm owning a 53 Pontiac Catalina with an Inline 8 which I actually rebuild. I had also an issue with the hydra-matic so I decided to check the transmission. Always when pushed in Neutral or when towed I had a rattling noise coming from the tranny that stoped when the car reached a certain velocity. I opend it and located the source of that noise. There is a Parking Brake Gear and sort of blocker lever. And this lever causes the rattling noise.


Now. I am no sure, if this is a Problem. Usually I don't move the car in Neutral. Perhaps there is a problem with a valve that doesn't keep the blocker off the parking brake gear in Neutral.




The parking brake blocker lever




the parking brake gear with slight signs of wear. the lever is removed




Blocker lever and gear disassembled.


Hope my english isn't too bad, it's not my mother tongue.

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hello, the parking lever may have a worn out torsional spring, allowing the pawl to come in contact with the internal reverse gear.


charles l. coker

1953 pontiac tech advisor

tech advisor coordinator

pontiac oakland club int'l.



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Thank you Charles for your answer.

I guess you mean that torsional spring in the following pictures? Any Idee where I get such replacement parts?






Edited by yannick (see edit history)

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excellent source of parts, information, and rebuilding service, 

gene berck transmission

salinas, calif.


website is

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