Pulled engine to replace cracked flywheel causing vibration. Afterwards, tranny starts shifting hard and longer. 35 mph to second and 60 into high. Downshifts hard. Replaced modulator valve but seemed to not help much. Manually shift its smooth into second but longer at 60 for high but smoother. Still shifts hard when taking off in drive. New filter and fluid was replaced. Bolts were left loose in bell housing that caused space and result in the crack flywheel.