First, welcome to OCC....
Well, that is a problem.
As I see it, you have three options.
(A) Repair the Sundstrand Hydro Unit by installing a new input shaft
(B) Replace the Sundstrand Hydro Unit with a new one
(C) Replace the Sundstrand Hydro Unit with a good used one.
If this were me, I would go with A or C.