I pulled my driveshafts out to replace the seals. I replaced my left drive shaft and it appears to seat flush with the transmission no problem, but now my right on will not go back in. I appears to stick out about a half inch. Also, when I look in the transmission spline hole, there is a rod running transverse through the opening between the two driveshafts. I'm wondering if is what is stopping the driveshaft from seating. Anyone with any advice?