"thud" from the rear
Thread Starter
Drifting
Joined: Nov 2000
Posts: 1,361
Likes: 0
From: Honolulu Hawaii
"thud" from the rear
I’ve recently developed a “thud” noise when launching hard off of the line and at the 1-2 shift. I read on Toms Differential website that this can be cured be installing a couple of aluminum disks at the rear crossmember cushion points. Does this stuff work & how hard was it to install? Thanks.
Race Director
Joined: Nov 2000
Posts: 16,416
Likes: 1
From: NC,USA
Re: "thud" from the rear (nunus79)
you probably just lost the cushin... it stops the diff from rocking forward and backward, making a knock against the frame... that should be it... though i guess you could have a loose ujoint thats twisting, but that would be a vibration, not a knock
ZD
ZD
Melting Slicks
Joined: Oct 2001
Posts: 2,065
Likes: 1,395
From: Halifax, Nova Scotia, Canada
Re: "thud" from the rear (nunus79)
The front Diff rubbers (over the pinion Ujoint) do go bad.
There is a top and bottom one. The top one (the one you can't see easily)
compresses and allows movement which can cause a thud.
I would check all ujoints and all differential mounting rubbers.
Barry
There is a top and bottom one. The top one (the one you can't see easily)
compresses and allows movement which can cause a thud.
I would check all ujoints and all differential mounting rubbers.
Barry
Melting Slicks
Joined: May 1999
Posts: 2,897
Likes: 0
From: Moon Township PA
Re: "thud" from the rear (nunus79)
I agree that accelerating from a stop and hearing a thud or thunk can be the forward differential bushing. If you have an AIM it clearly shows this. This is a fairly easy fix and can take about an hour. Do a search on "differentials" and see if you can pull up the recent thread on this discussion.
Gary
Gary
Thread Starter
Drifting
Joined: Nov 2000
Posts: 1,361
Likes: 0
From: Honolulu Hawaii
Re: "thud" from the rear (GaryS)
LOL, I tried searching on thud, thunk, thump before posting this thread. I knew there was a recent thread on this subject. I'll try searching on "differential". Thanks.
The sound is not like a bad u-joint. How can I describe it ..............hmmmm............Its more like the sound that GaragedwellerII's head whacking a plastic bumper would make, only more solid like :D
The sound is not like a bad u-joint. How can I describe it ..............hmmmm............Its more like the sound that GaragedwellerII's head whacking a plastic bumper would make, only more solid like :D
Safety Car
Joined: Apr 2001
Posts: 4,795
Likes: 1
From: Regina Saskatchewan, Canada.
Re: "thud" from the rear (nunus79)
I test drove a 76 automatic car back in 1996 with that problem. When put in reverse from park there was nothing but from reverse to drive or from park to drive there was a metal on metal thunk. I knew exactly what it was without even getting under the car to check.
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From: The Only Corvette in Gila Bend, Az.
St. Jude Donor '09
Re: "thud" from the rear (john73bb)
I've never heard mine go thud !
But if this topic was titled : noise from the rear going sqweek, sqweek, sqweek, sqweek, sqweek, sqweek, sqweek, sqweek,
Then I might have had an answer for you :smash: :smash: :smash: :smash: :smash:
But if this topic was titled : noise from the rear going sqweek, sqweek, sqweek, sqweek, sqweek, sqweek, sqweek, sqweek,
Then I might have had an answer for you :smash: :smash: :smash: :smash: :smash: