Vibration
Thread Starter
Teching In
Joined: Feb 2010
Posts: 6
Likes: 0
From: San Antonio, TX
Vibration I have a 2000 WS6 M6. Im getting a moderate vibration when driving in low rpm. Even at speeds of around 20mph I can feel the car vibrate when Im at 2000 rpm or less. The higher it is above 2000, the less I notice the vibration. The people Ive talked to told me it could have something to do with my trans mount. I was wondering if there is anyway to tell for sure..., or if I should take a shot in the dark and change it. Thanks
Vibrations suck. I had to track one down recently. First you need to figure out if:
A) it only happens while the car is in motion at a certain speed, regardless of rpm
B) it happens when the car is stationary and varies with rpm
If it happens it situation (A) it could be anywhere in the drive-train, from the tranny back. ie. transmission, drive shaft, rear axle, tire balance, suspension, etc.
If it happens in situation (B) then it's from the clutch assembly forward. ie. disc, pressure plate, flywheel, internal motor imbalance, accessory pulley, etc.
My vibration happened when the car was stationary and varies with rpm. This is how I diagnosed it.
1) pulled accessory belt and started motor- no difference
-this means that it is not one of the pullies (besides crank pulley)
2) held a screw driver next to the crank pulley while the motor is running to see if the crank pulley was wobbling/bent- not bent & no wobbling
3) pulled the transmission and stared motor- no difference
4) pulled pressure plate and disc, then started motor- vibration gone!
A) it only happens while the car is in motion at a certain speed, regardless of rpm
B) it happens when the car is stationary and varies with rpm
If it happens it situation (A) it could be anywhere in the drive-train, from the tranny back. ie. transmission, drive shaft, rear axle, tire balance, suspension, etc.
If it happens in situation (B) then it's from the clutch assembly forward. ie. disc, pressure plate, flywheel, internal motor imbalance, accessory pulley, etc.
My vibration happened when the car was stationary and varies with rpm. This is how I diagnosed it.
1) pulled accessory belt and started motor- no difference
-this means that it is not one of the pullies (besides crank pulley)
2) held a screw driver next to the crank pulley while the motor is running to see if the crank pulley was wobbling/bent- not bent & no wobbling
3) pulled the transmission and stared motor- no difference
4) pulled pressure plate and disc, then started motor- vibration gone!
Thread Starter
Teching In
Joined: Feb 2010
Posts: 6
Likes: 0
From: San Antonio, TX
Yea..., its only happening when the car is in motion. If I take it out of gear, it stops immediately..., so I assume its something with the transmission, just not sure where to start. Thanks for the advice...
hmmmm. that's a tough one. Could be a u-joint that only vibrates under load.
So, if the car is not moving and rev the motor a little, there is no vibration?
When you are in motion and the car is gear (all gears?), there is a vibration?
While in motion and the car is in gear, does it still vibrate when you push in the clutch?
So, if the car is not moving and rev the motor a little, there is no vibration?
When you are in motion and the car is gear (all gears?), there is a vibration?
While in motion and the car is in gear, does it still vibrate when you push in the clutch?
