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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!
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| | | | Joined: Aug 2008 Posts: 116 Shop Shark | | Shop Shark Joined: Aug 2008 Posts: 116 | I finally started my '41 GMC on Friday after sitting for three years. After unsticking the float needle, all is fine. I drove it about ten miles and turned around on as asphalt driveway. One rear tire dropped off the pavement about 6 inches. When I eased forward, I heard a terrible popping sound. I stopped immediately and looked underneath. Seeing nothing out of the ordinary, I inched it forward again...and still had the popping sound. I put it in reverse and it did not pop. After several forward and backward moves, it made one popping sound and I felt whatever was in a bind free up. It has given me no problems since. Does anyone have any idea what might have been going on? Thanks, Jim. | | | | | Joined: Jan 2000 Posts: 2,074 'Bolter | | 'Bolter Joined: Jan 2000 Posts: 2,074 | Need to do a visual inspection inside differential, pop the cover rotate gears. I'd jack it up and see if you can rotate wheels etc.
Best of luck | | | | | Joined: Mar 2005 Posts: 684 Shop Shark | | Shop Shark Joined: Mar 2005 Posts: 684 | I finally started my '41 GMC on Friday after sitting for three years. After unsticking the float needle, all is fine. I drove it about ten miles and turned around on as asphalt driveway. One rear tire dropped off the pavement about 6 inches. When I eased forward, I heard a terrible popping sound. I stopped immediately and looked underneath. Seeing nothing out of the ordinary, I inched it forward again...and still had the popping sound. I put it in reverse and it did not pop. After several forward and backward moves, it made one popping sound and I felt whatever was in a bind free up. It has given me no problems since. Does anyone have any idea what might have been going on? Thanks, Jim. Maybe it was the torque tube ball on the back of the transmission. Possibly froze up from sitting so long?? | | | | | Joined: Aug 2004 Posts: 1,418 ODSS Lawman | | ODSS Lawman Joined: Aug 2004 Posts: 1,418 | With all these unknowns, opening the rear cover is the first step. There could be something inside like water, low oil, or debris that can cause noise. Also the gears, bearings could have an issue.
Best bet is to open it up and see what you have.
SWEET Sergeant At Arms: Old Dominion Stovebolt Society BUNS?!?!?!Where we're going, we don't need no buns.....1950 GMC 450 1951 Chevy 1/2-TonThe GreenMachineIn the Stovebolt Gallery | | |
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