Trans or something else?
08-19-2007, 05:05 PM
#1
Instructor
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Trans or something else?
I have a 1969, 350, Automatic
I have noticed more and more that when I shift from park to reverse or drive that I get a nice clunk from the rear wheels area, more so when going into reverse. Is tis a transmission problem or something else ?
I have noticed more and more that when I shift from park to reverse or drive that I get a nice clunk from the rear wheels area, more so when going into reverse. Is tis a transmission problem or something else ?
08-19-2007, 05:10 PM
#2
Race Director
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St. Jude Donor '11-'12-'13-'14-'15-'16-'17-‘18-'19-'20-'21-'22-'23-'24
I would check your u-joints but Vettes are known for their harsh shifting into reverse causing a little clunking sound.
08-19-2007, 07:01 PM
#4
Burning Brakes
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If you find that the U-joints are ok, check the diff upper and lower cushions. Mine were worn out and just recently replaced, made a world of difference.
Good luck,
Dino
Good luck,
Dino
08-19-2007, 07:33 PM
#5
Drifting
08-20-2007, 12:05 AM
#7
Team Owner
The most likely culprit is the rear end bumper pad. It is easy to check. Just have someone shift it from drive to reverse and back while you look underneath. MAKE SURE THEY KEEP THE BRAKE APPLIED! (use the e-brake, if yours works) If the bumper pad is bad, the rear end housing will "twitch" up and down as the tranny is shifted. If the pumpkin doesn't move, it's U-joints.
08-20-2007, 08:05 AM
#8
Melting Slicks
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The most likely culprit is the pad that absorbs the shock on the front differential bracket. The rubber part you can see will look good but the pad that you can't see will be worn out and allow the front fiff to clunk against its support when you shift from forward to reverse. This is also easier to check and change than your u-joints.
Bernie
Bernie
08-20-2007, 08:27 AM
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Le Mans Master
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Yes they are talking the same pad and its a good candidate. When you check the U-Joints, use a floor or bottle jack to raise the trailing arm to unload the half shaft, then check the jount. With it loaded you may not see the wobble in it