Well Seegee that's a common problem with the aluminum driveshaft.... If your driveshaft can't move back and forth two to three millimeters in the cups, then it will wobble more, but you really need a niftech titanium driveshaft for mod motors, or you can try ewhippler's carbon shaft.....
Originally Posted by
SeeGee911
I'm putting together a ft tc4, and I have a problem with a bad vibration in the center driveshaft. It's vibrating enough to hit the vertical plate next to it at medium throttle, and makes an awful racket. The shafts holding the diff pinion and drive cups are quite stable, so my problem is isolated to the shaft itself... It is a new shaft, and seems to be perfectly straight. Any ideas?