Topic: Still got the 'CLUNK'!
in Forum: C3 Driveline Components
Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|
Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|
Lifetime Member| C3RVETTE said: still makes a loud clunk when it slams into reverse when the RPM's are too high(typically when cold). |
Dont do that... let your car warm up.....
but as for noise in corners..
did you check your
transmission mount ??
swaw bar bushings ??
exhaust system ??
I had a loose U-clamp that let my exhaust rock back and forth only when it got hot.. when i touched it cold it didnt move..
tightened it up and the sounds is gone..
cthulhu said:
Dont do that... let your car warm up..... but as for noise in corners.. did you check your transmission mount ?? swaw bar bushings ?? exhaust system ?? I had a loose U-clamp that let my exhaust rock back and forth only when it got hot.. when i touched it cold it didnt move.. tightened it up and the sounds is gone.. |
Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|
Lifetime MemberMy 73 had a heavy clunk going into reverse when I first got it.
In the restoration / rebuild adventure, one of the first things I did was to replace the transmission (TH400). A new tranny made no difference. Well, maybe it did make a difference, the clunk sounded smoother, but was still there.
Continuing in the rebuild, many moons later, I finally got around to the rear of the car. I dropped the entire rear suspension and drive components.
I sent the rear end, trailing arms and bearings off to be rebuilt. Its not that I thought anything was bad, but while everything was off... and since I'm only doing this job one time... they were rebuilt.
When I reassembled it I replaced everything... rubber, all U joints, etc.
The clunk I had before is much much less now. But there is still a (faint) clunk. (It might be because I am aware of it, anyone else wouldn't hear it
)It sounds like you too have replaced just about everything in the rear driveline... except the rear end itself. You might need to have it looked at.
Also, the symptoms you described (going into reverse, quick turns) kinda sound like things a tired differential might groan (or clunk) about.
One thing you might try to isolate the problem is to get someone else to shift the car and you listen from the outside to see if can pinpoint where the clunk is coming from.
Let us know how you do...
1973 Coupe 
(click to see a bigger version)
m going to have to make some more money 1st,as I just got laid off.The rear end is not something I want to tackle even if I had a decent place to work on it..which I dont.I suppose having it "rebuilt" would be more economical than replacing one?
Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|
Something to think about - You can get rebuilt differentials from a place like Mid American for $800 (with a rebuildable core) That way you can change the rear axle ratio if you want to.
Jon,-Majestic Glass Corvette Club-....Red #72,blk.interior,1979 C3 Corvette-TH350,Weiand,Holley,glass tops,Pioneer,3.55's,K&N,Dynomax,Flowmaster 40's,Energy Suspension,Spicer,VB&P(pics soon); 1978 Olds Cutlass Supreme 350/350,Dk. Blue 2-door Coupe-Hotchkis,PST,K&N,XM...'99 Mitsubishi Galant GTZ V6,black/grey leather,intake,strut bars,tint... |IMG|http://www.msnusers.com/cutlasscorvetteworkinprogress/shoebox.msnw?action=ShowPhoto&PhotoID=63|/IMG|