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Help! 1954 Powerglide Noise

joe_navy1990

New member
Joined
Aug 5, 2019
Messages
1
Location
Norfolk, VA
Greetings,

Occasionally when going over bumps the shifter in my 1954 Corvette with standard 2-speed Powerglide transmission would vibrate and a grinding noise would come from the approximate area where the shifter attached to car. Once or twice the vibration caused the nut which holds the decorative cover on the inside of the car to back off. These events were rare, seemed to be related to bumps in the road and were most prevalent with two people in the car. During my last drive after going over a particularly bumpy road the noise persisted when going forward on smoother sections of pavement. If I put lateral pressure on the shifter, pushing it toward me as one would when preparing to shift but keeping the lever in the drive position, I could drive the car and the noise stopped. Can anyone tell me what the cause/source of this noise might be?

Thanks,

-Joe-
 

gmjunkie

Well-known member
Joined
Nov 11, 2004
Messages
4,519
Location
Old Fort NC/Vero Beach FL
Corvette
03 Z-51,78 L82 Coupe
Might be a broken trans mount or motor mounts.
 

Hib Halverson

Technical Writer for Internet & Print Media
Joined
Jan 10, 2001
Messages
13,453
Location
CenCoast CA
Corvette
71 04 12 19
To start the diagnosis, I'd get the car up on a lift or high jack stands and inspect all bolts holding powertrain mounting brackets and check all powertrain mounts.

Also, inspect the frame around powertrain mountings for cracks.
 

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