I installed an S60 Differential, I measured for driveshaft shorting about 6 times. I think my shaft is too long as it bottoms out on the trans shaft and forces side movement to the tailshaft seal since I've had to replace it twice. and my leak doesn't go away. As you can see there is less than 3/4in clearance since the 6in ruler willl not fit in between seal and yoke (about 3/4in wide). What I need is what is the distance on 200R4 seal to the yoke front ? I think I need to shorten the driveshaft so that it floats into the shaft. Help Help!