GT-14 piston to piston/hydrogear

[cafoose 3,729]

My one GT-14 with a piston to piston Sundstrand has a cracked transaxle case. I have a parts GT-14 with a hydrogear unknown condition. I would like to put it in the piston to piston tractor. Would it make better sense to put the whole unit in not knowing the condition of it or to put the transaxle from the hydrogear on the piston to piston tranny? Will a piston to piston tranny bolt up to a hydrogear transaxle?

[953 nut 66,069]

@daveoman1966 will probably be your most reliable source on P to P swap to H-Gear.  With just a little more work you could go with an Eaton 1100. If you have a three point hitch being operated by the tractor lift cylinder it is a bit more work but very doable. I have pictures of mi Eaton swap and @19richie66 has done this too.

[cafoose 3,729]

No three point on this one. Just did a swap from H-gear to P to P on a c-160 with a transplanted 10 hp K series. Swapped the whole unit and it was pretty much a direct fit. Got a 12 hp k series I'm getting ready to put in the C-160. Would love a 16 hp but they seem to be scarce unless your name is Eric and you live in Maine, right @ebinmaine  

[pfrederi 20,533]

The piston to piston hydro pump and motor will bolt up to the hydro gear transaxke how ever where did the current piston to piston unit come from was it a total swap hydro pump motor and transaxle..   I suspect you will have problem, the hydro gear transaxles for GT 14s have a different input gearing than non GT 14 units.  There is a thread here about swapping out the input gears  but it was to change the motor not the transaxle.  I assume you could swap out the gears n the transaxle to match your piston to piston motor

[cafoose 3,729]

@pfrederi Both piston to piston and hydrogear units come from a GT-14 so then it should bolt right up? Maybe I'll hook up an engine to the parts machine and see if the whole unit works