: 93 Fleetwood Overdrive Vibration?

10-07-04, 05:08 AM
93 Fleetwood 178K miles. I'm feeling a vibration from the rear end when travelling up hill at high speed (70 or better) and I'm assuming the tranny is trying to downshift. If I put it in D as opposed to overdrive, the problem disappears. If I punch it when starting uphill, the downshift works without the vibration. I checked the fluid and it's actually a bit overfilled - I plan to drain a bit out to see if that helps. Has anyone else experienced this?