Well been over a week since last post but managed to split the 1650, pulled the Hydro unit off, and it looks like I will require more input from the more experienced peeps on hydro function....
RECAP; Rear end was functioning as if it was a vehicle rear end in park. Up in the air (on the bench) both axles spin super free in opposing directions, but try to spin the both in the same direction and its a no go. So felt something was holding back the reduction gear, either the brakes stuck or the input shaft. Confirmed brakes were free, left me only with the hydro unit.
Further for those who have not reviewed/seen my past posts re this issue, the relief valves are both free (one was stuck but manage to free it up) and issue is present regardless of valves being in place or removed completely from the hydro.
From there I pulled the Hydro unit and after that I was able to rotate both axles in the same direction, with considerable resistance but no more than one/I would expect given the gears. So then I tried to rotate the hydro gear and was able to do so with some effort(wrapped fist around gear teeth and cranked) It was difficult to turn but turned.
So.... How much resistance should one feel on the hydro unit (when pulled from the trani)? Should I be able to spin it using thumb/finger? or is it expected to see it stiffer than that?
I then reassembled hydro to trani and back to pretty much parked condition.
Final note, tractor drives forward and reverse no issues at all, just cant push by hand when its shut off and in what would be called a neutral state, without hooking a chain to my truck...... They do roll just needs far more power and if one wheel loses traction say over slippery concrete, that wheel would roll backwards while the other goes forward...
I think I got all the details out there now... Sorry for the long message, but if anyone has a thought/input to help it's greatly appreciated, being my first hydro to work on and all....
I'm thinking I'm afraid to hear the answer of what I expect to come.....
BUT at the same time I'm also thinking maybe dried seals in hydro pump and maybe some lucas additive might help rejuvenate.....