Thump at acceleration
Thread Starter
Melting Slicks
Joined: Apr 2002
Posts: 2,337
Likes: 14
From: Norfolk VA
Thump at acceleration
Yesterday one of my friends came by in his 77 to ask me if I can hear a faint "thump" under acceleration. I asked him when does it occur; he said at 45 mph. So I ride with him and he steps on the gas (in drive range), you feel the upshift but then I heard a faint thump as the car accelerated his vehicle (continued to pull steadily as RPM increases)
Today I got in my corvette (79) and hit the gas I feel the upshift, no thump and my vehicle continues to pull steadily as RPM increases. We both have th350 trans. What could be the issue with his vehicle... modulator, kick down cable?
Today I got in my corvette (79) and hit the gas I feel the upshift, no thump and my vehicle continues to pull steadily as RPM increases. We both have th350 trans. What could be the issue with his vehicle... modulator, kick down cable?
Last edited by Oldguard 7; Oct 13, 2014 at 07:15 PM.
Burning Brakes
Joined: Apr 2010
Posts: 1,018
Likes: 9
From: Winston Ga.
check the engine mounts, tranny mount, u joints, diff mounting bolts.
I think I had a prob of some type with every component. once I tightened them up or replaced missing/worn bolts i lost my thump. the biggest change was replacing the tranny mount. take it off and look at it. dont look at it while its mounted and assume its good.
I think I had a prob of some type with every component. once I tightened them up or replaced missing/worn bolts i lost my thump. the biggest change was replacing the tranny mount. take it off and look at it. dont look at it while its mounted and assume its good.
Drifting
Joined: Jan 2011
Posts: 1,853
Likes: 81
From: Hamilton Virginia
check the engine mounts, tranny mount, u joints, diff mounting bolts.
I think I had a prob of some type with every component. once I tightened them up or replaced missing/worn bolts i lost my thump. the biggest change was replacing the tranny mount. take it off and look at it. dont look at it while its mounted and assume its good.
I think I had a prob of some type with every component. once I tightened them up or replaced missing/worn bolts i lost my thump. the biggest change was replacing the tranny mount. take it off and look at it. dont look at it while its mounted and assume its good.
