My '86 300 E has once again come up with some new problems. First of all, the gear doesn't shift pretty late at low gears and when it does it shifts at very high RPM. In fact, the RPM shoots up right before it shifts to a higher gear. In fact today morning it shot uto 5500 RPM on the 1st gear before shifting to the 2nd. Is this an indication that i need to change the transmission or would a transmission servicing do? I'm ready to order the Filter Kit from Shop Forum, just waiting for some response from you experts. Thanks.