2008: Vibration in drive but way more in reverse...

carboncow · Post by **carboncow** » 26 Apr 2018, 19:38

Friends 2008 3.2L FWD with 122K.

Complained of some transmission issues so I did a 12L fill/dump for them. Didn't really notice any hard shifts or flares but it was very dirty w/o being burnt.

Complaint was in reverse and although I felt no hard clunk or such I do understand the vibration felt through the vehicle they must be concerned about. Way more pronounced in reverse and mild in drive...smooth as butter in P and N.

Please note this vibration is felt with foot on brake and not moving. Not while underway.

While in reverse It's got a noise to it to like the sump pump in the basement is running pretty hard! Nothing in P and N.

Are we talking any common transmission or engine mount that might be causing this?

Post by **ggleavitt** » 27 Apr 2018, 13:37

Vibration in reverse or drive when car is not moving?

Vibration noted in reverse or drive when car is moving? If vibration is noted on moving, does it change as a function of wheel speed or engine speed?

The sump pump sound in reverse, car is moving or not moving?

ashvolvo · Post by **ashvolvo** » 27 Apr 2018, 14:02

Seems like the mounts, open the hood and then put car in D and put another foot on the brake, have some one observe ( from the side- not standing facing the car for safety) when you rev up; does the engine tilt? Put in Reverse and do the same test. If the engine is tilting/rocking then it is the hydraulic motor mounts. You may also check the lower engine mount near the crank shaft pulley.

carboncow · Post by **carboncow** » 28 Apr 2018, 09:43

ashvolvo wrote: ↑27 Apr 2018, 14:02 Seems like the mounts, open the hood and then put car in D and put another foot on the brake, have some one observe ( from the side- not standing facing the car for safety) when you rev up; does the engine tilt? Put in Reverse and do the same test. If the engine is tilting/rocking then it is the hydraulic motor mounts. You may also check the lower engine mount near the crank shaft pulley.

Thanks. Is there a particular mount that controls the rotational energy vs just the mounts in the pan? I've had many a V70/XC70 that I'm sure pan mounts were long over due but never felt such a vibration while I also know there are several mounts that that were obviously related to the rotational energy, cheap and easy to replace...just not seeing such on this engine, yet.