I have changed my wheels, tires, and driveshaft, and STILL have vibration! What in Gods name could this be? I';ve heard the Torque converter could do this, but I dont want to take the whole freakin tranny out right now if I dont have to! Any ideas?

 

Ive changed everything on my 85 bird
Engine,trans,convertor,changed to alumin.driveshaft,new half shafts and bearings,new crown wheel and pinion plus axle bearings,completely new wheels,tyres and Baer brakes,all shocks,springs and suspension bushes,fitted sub frame connectors.panhard rod,trailing arms and strut brace,transmission and torque arm mounts and IT STILL VIBRATES!!!!!!!!!!!!!
Sorry,Powermite

 

Anyone know what could be going on here?

 

Is it RPM related or speed related?? (will it do it sitting still??)

If its RPM related, take the time to remove the torque conv. shield off and unbolt the conv. Make sure to push the conv. back into the trans away from the flexplate.

Now start the car and bring it up to the problem RPM...if it doesn't shake, its trans/conv. related.

If it does shake, its in the engine. (balancer, etc.), one quick note, I have seen water pumps cause a REAL bad vibration.

This will ID which direction to go. (engine/trans)

If its speed related, then its in the suspension/driveline. (sounds like you've got that covered. )


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ASE Mechanic/Machinist/Smog Tech

1999 NBM Trans Am
1986 Chevy 3/4 ton pick up
1981 corvette
1995 Kawi ZX6R

R.I.P. #3
"He can see air"

[This message has been edited by Engineboy (edited May 30, 2001).]

 

With the car in neutral, its revs smoothly all the way up to 5500, so I dont think it is the engine. In addition to the Driveshaft and tires/wheels, I also have changed the stock panahrd rod and LCA's to BMR adjustable units (this should have any effect on vibration, though). I guess I'll have to dig deeper. Thanks guys.

 

Scott, does your car idle smooth and when you put it in gear it vibrates, or feel like it's surging? Mine did this about a year ago and I chased it for about 2 months. After checking everything I could think of, I took it in and had the tranny checked, it was good. Took it to a guy I know who owns a shop here in town, and we checked everything as well, and it was all good. Turned out to be the injectors, which I had just gotten cleaned and flow checked with less than 2000 miles on them. I never thought it would be that, but it was all that was left to do, and sure enough... just some input for ya...

KAM