i replaced the front goetze(flex disc) and center support for the driveshaft in my 85 300d a while back. my memory is a little foggy but i think i remember the drive shaft having splines somewhere In the middle by the center support? or at the back of the trans? and despite my attempts at matchmarking it has been off a spline or two. the car is running well except for the slight vibration and resonance. im sure this is what the problem is as it started right afterward. anyway to correct this without guessing or taking the whole thing out to have it rebalanced?