Also did you service the tranny while the pan was off, adjusting the clutches etc? Would have been the ideal time. +1 on cracks and also (?) damaged or bent actuators and rods.
Good - Fast - Cheap: Pick any two.
E23 735i; E30 318i; E32 735iL; E38 735iL; R50 Cooper; R55 Cooper Clubman.
E21 318i; E32 735iL; E34 535i; E38 730iL; E53 4.4i