Quote:
Originally Posted by 97 SL320
Do a search for RSN ( Rumble Strip Noise ) on some sprinter sites. The torque converter clutch may be dragging / being too aggressive causing a slip - stick - torsional vibration ( like being in too high of a gear in a standard trans )
The TCC on the 722.6 is modulated from 0 to about 98% lockup. When you are harder on the throttle the TCC isn't engaged as much so you don't feel the shudder.
A fix is to replace the TC with a spring release clutch. Changing fluid might not fix this. About the only additive I'd try is a friction modifier ( like posi traction additive ) called " Shudder Fixx " , it is made by " Lubeguard " Instant Shudder Fixx it is about $ 7 a tube. I've used this on many non MB cars and it works, as long as the problem is a TC shudder not a failing trans. |
You are right on, and agree with Marc at SVMT. I changed the fluid today, and man was it gorse! I think it had never been changed. It was dark greenish brown. Using compressed air through the cooler line fitting, I was able to get 6.5-7 qts. out. There was just a very little grey fuzz on the magnet, so that is good. As suggested by Marc, I used cheap fluid and a new filter this time, and will change it again using synthetic. On the test drive, I noticed that almost all the shudder is gone. I would say about 80 percent, whereas it was horrible before (almost not derivable). There is just a mild shudder after the 2-3 & 3-4 shift. I am hoping another flush will get rid of the shudder completely. Worst case is I will try the shudder fix. Thanks, Rich
02-15-2017, 08:46 PM
Threaded Mode
