|
Zombie thread alert. Sorry to raise such an old thread from the dead, but I really wish I would've seen this one before I made the mistake of purchasing the UUC Transmission mounts. I installed them a couple weeks ago along with the M3 rear subframe bushings. When I did that install I had a problem with the bolts that attach the rear section of the exhaust. They were apparently over tightened by the factory and we're completely stripped. As a result I tried installing hardware from Home Depot as a temporary fix. I got an exhaust leak and vibration which I thought might be related.
After that I ordered replacement hardware, including new bolts and a new exhaust gasket. I installed those today, and while the exhaust leak was corrected, the vibration remained. It is well and truly beyond what I would consider acceptable. The whole car vibrates when the engine hits roughly 1,700 RPM, and it is occasionally especially strong on deceleration. I do not recommend installing the UUC bushings unless you were going to race the car. It also results in a pretty severe driveline boom when changing gears. I will be returning the car to the factory bushings as soon as possible. Unfortunately I made the mistake of throwing the old ones out, so I have to order new ones now.
Bottom line, I would recommend avoiding the UUC bushings altogether for street use. It's honestly pretty shocking how much vibration they introduce.
|