PeachParts Mercedes-Benz Forum - View Single Post - H-E-L-P ! Engine miss persists after valve job..

Andy_M · #14 09-17-2007, 03:58 PM

Did a few road tests lunchtime today. The result on shift is distinctly different depending on the situation:

1) Under moderate or heavy acceleration the shift is crisp but no big thunk is apparent.

2) Under very light acceleration, or if you are easing out of the throttle as the trans shifts (like in traffic) you get a BIG thunk from the rear area.

3) similar noise when trans is shifting down but thunk is not as apparent.

4) The noise does not seem to eminate from the front of the driveshaft (tail of the trans), it seems to be in the back near the differential.

If Flex disk, would you suspect rear, or both ?
If differential mounts, would there be any other characteristic to look for? Doesn't seem to be any sloppyness or anything....