hi gene thx for that input. and i was thinking along the same lines in the begining. i started with new tires, then i found a shop that would balance the tire to the rim because non of these factory wheels are true. with all that, no change. but remember, there was a significant change after the carrier bearing, bushing and driveshaft balancing was done. its just not completely gone, plus the last thing we tried was the correct trani mount, and after that was put in the vibration was actully more pronounced, sooooooooo, im still exploring. thx alot vito