C4S driveline whine
05-11-2012, 07:33 PM
#1
Thread Starter
C4S driveline whine
Now that spring is here, I've taken my new-to-me C4S on a few mountain runs. The car has just been serviced and the front differential has new oil but at speed I hear a driveline whine coming from the middle-to-front of the car. When coasting in neutral the whine is still there and is related to speed not engine RPM. When the power is engaged, the whine is a bit louder. Anyone with an AWD car had this and what is t typically? BTW the viscous coupling was replaced just before the car was sold to me...
05-11-2012, 08:47 PM
#2
Three Wheelin'
Zack,
never experienced that. You might jack the car and feel for play in the front wheels to see if it might be as simple as front wheel bearings. I'd also make sure the front diff is completely filled.
never experienced that. You might jack the car and feel for play in the front wheels to see if it might be as simple as front wheel bearings. I'd also make sure the front diff is completely filled.
05-12-2012, 12:56 AM
#3
Nordschleife Master
The front driveline goes through the shifter. This part needs to be greased. You can do it form inside the car, if you pull the shift **** off, & remove the rubber boot under it. You can also get it form under the car.
On my C4, this was driving me NUTS! Turned out the rubber boot under the shifter was falling apart, & letting a bunch of noise into the car, replaced that & lubed the drive shaft & it's a lot quieter.
On my C4, this was driving me NUTS! Turned out the rubber boot under the shifter was falling apart, & letting a bunch of noise into the car, replaced that & lubed the drive shaft & it's a lot quieter.
