As we discussed earlier - the 2 small sealing rings that install on the input shaft, that seal the input shaft to the inside of the pump, CAN NOT cause a reverse apply failure, simply because they are the seals for the rear clutch, which is not applied in reverse.

If the 2 rings on the outside of the reaction shaft that seal to the inside of the direct clutch (front) drum fail to seal fail, the front clutch won't apply properly, and you will lose reverse, direct (3rd) and O/D.

I air check my clutch applies both as a rear/front clutch/pump assembly, and again once the pump is in but before I install the V/B.