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Mod | | | Forums66 Topics128,066 Posts1,055,873 Members48,428 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Jan 2016 Posts: 1,101 'Bolter | | 'Bolter Joined: Jan 2016 Posts: 1,101 | I am still desperately trying to diagnose my driveline vibration. New differential and axle bearings. New u-joints. Driveshaft in phase. With clutch engaged it runs smooth for the most part. As I get to higher speeds I can feel a little vibration. About 50 MPH. As soon as I push the clutch in and disengage it I get a vibration. The more I slow down the worse it gets. It finally stops when I am under 10 MPH. If I reengage the clutch it stops.
I am a rookie when it comes to clutch and transmission so try not to laugh. Could the clutch be out of balance? When it is engaged it is stabilized but when disengaged it is free to wobble? I am just throwing stuff at the wall to see what sticks.
Last edited by dgrinnan; 07/31/2023 4:32 PM.
| | | | | Joined: Oct 2021 Posts: 6,771 'Bolter | | 'Bolter Joined: Oct 2021 Posts: 6,771 | Do you have access to a lift?
If so, do some precise measuring of the frame from side to side, diagonals front to back, etc. Study all four tires closely. Any unusual wear patterns from side to side? Rear axle might be cockeyed, etc etc.
If you don't have a helper, use a mason's line, mark the points on it with a Sharpie and measure the string when you're finished.
1950 Chevrolet 3100 (Ol' Roy)
1939 Packard Standard Eight Coupe (The Phantom) | 1956 Cadillac Coupe de Ville (The Bismarck) | 1964 Ford Galaxie 500 coupe |1966 Ford Mustang (Little Red) | 1969 Pontiac GTO (The Dishpit) I 1979 Ford F-100 | 1976 Ford F-150 (Big Red) | 1995 Ford F-150 (Newt)
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