Hey Guys:

I have a slight but constant vibration as I drive nowadays which seems to have started a while now but is getting worse. It appears to affect the entire car and gets worse the faster I go. It's not the tires as they are balanced properly. It appears to be drivetrain related. When decelerating the vibration seems to be concentrated at the front of the car as indicated by a rattling noise, however, while accelerating there is no rattling just a slight vibrating which even the passengers can feel. If while decelerating I depress the clutch the vibration\rattling immediately stops. I don't think it's the throw-out bearing as it not only rattles but vibrates. At 90MPH it's unbearable.

Any ideas or thoughts?

Thanks!

 

No ideas?

 

Check for slop in your drive shaft, front axles, rear axles. That could be your problem for sure. Jump under there and pull the shafts up and down you shouldnt see ant play if you do there you go

 

Is there any vibration when you rev the engine while sitting still? If the vibration goes away when you press the clutch it is probably not a driveshaft or axle problem. I would try revving the engine with the clutch engaged and with it disengaged and see if it vibrates in either of those scenarios. That could narrow it down to the engine or the clutch.

-Paul

 

Agreed I didnt read his push in the clutch part.

 

I know you said it's not the wheels out of balance, but you said the faster you go the worse it gets. After they were balanced was there a period of time before you got your car out on the highway to notice it maybe?

I bought new tires for my wife's car and took it home, no problems (city streets). She went somewhere in it (on the highway) and came back complaining of a vibration. I took it out on the highway and she was right.

I went back to the tire place and they discovered the wheel balancing machine was out of whack. Every wheel was out of balance.

If you can't find the cause elsewhere have your wheels balanced again.

 

Could be any of these things. Just take time to check them all. Cold be something in the drivetrain. The bearings went in the u-joint at the rear diff in my truck and it would vibrate the whole truck, but I could def tell it was coming from the rear. The faster I went the worse it got because the drive shaft would stay lined up with the rear diff. If is something to do with a driveshaft, or a joint, I would get it checked out soon. You don't want to do any more damage. I drove the truck for a while before I actually took time to check out the situation, and the joint was so bad I was suprised it didn't fail completely.

 

+1, it really sounds like the wheel is out of balance, or may be out of round? how's your tire, is it still in good shape, or tread almost gone? also check your wheels to make sure they are straight too, did you ht a pot hole lately?

 

Wheels don't balance themselves when you push in your clutch. If the vibration really goes away completely when you push the clutch in, then it is most likely either the clutch or the engine.

-Paul

 

Do you have a aftermarket clutch? If so do you trust your installer? I have seen it where a bolt or two break on the flywheel or pressure plate, causing this vibration.

Best of luck!

 

I guess I didn't catch that part of his statement.