My 83Z 5 speed clunks when I put it in reverse, or pop the clutch a little too fast. Sound like a tranny mount? The sound seems to be coming from the rear end.
Also, I have posted this question before with no response: My clutch is really stiff on release in 1st or reverse. I recently had the motor out and could not find anything wrong with the throwout bearing or shaft. If I shoot grease up on the shaft, it will be OK for a week or so. Any ideas at all? It it possible that the race on the bearing is a little out of round, even though it looks fine? I could really use some ideas, Thanks

 

I would check the u-joints for the clunk
problem, although 3rd gen tranny crossmembers
are quite weak as well.

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when i have these problems i had someone outside the car trying to pin point the location of the noise they should be able to tell if it's rear or right by the tranny. If it is the tranny you should feel it hit the bottom of the body.

 

Ya, my 86Z does the same thing. Under hard acceleration from a stop, it feels like the tranny is gonna come through the motherf*cking floor pan I never really realized this, as I don't usually put the car under any stressful driving, but lately, I have and the problem seems like it should be taken care of fairly soon! Cheap part, but a good idea to get it taken care of.

Will

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'86 Z-28 305 c.i. LG4
Rochester QuadraJet 4bbl
Flowmaster 80 series Chrome Tips
Dual Snorkel Air Cleaner
K&N Filter
Michellin P215/65/R15 X-Radial Plus
Lots of Mods on the way
Pioneer 4"x6" dash
Pioneer 6"x9" rear
Alpine 8" Type S in bandpass box
Alpine Amp 300x1 bridged
Sony 4000X- x-Plode Deck 50w x4

Soon to be sporting Hooker SuperComp Shorties, CompCam Xtreme 256H, Edelbrock Performer EGR, World Sr Torquer 305's, DynoMax Super Converter, and American Thunder 3" Cat-Back !!!

http://camaroz28.cardomain.com/id/stanghunter211

 

i went thru 3 rubber ones before i got smart and got a poly one.

 

Ya, go with the Poly one, I broke a new rubber one right after I put it on and took the car for a spin.
My shifter would go up when I'd step on the gas and down when I let off.

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1986 Trans Am WS6
LT4 350, LT4 Hot Cam, T56, 52mm TB, MSD 6A & Blaster 3 Coil,
LT1 3.42 Posi/Disc Rear, Lakewood LCA's & Adjustable Panhard Bar,
Eibach Lowering Springs, 17x9 WS6 Wheels, T-Tops,
Custom 4" CAI w/ K&N Filter, 160*stat.
Autometer TriplePod with Phantom A/F & Boost Gauges.
High Speed Run: 157mph
Best 1/4 mile run: 14.94@91.67mph This was with the LG4 carb setup.
WS6 Trans Am.