[Fitz14]

First just a reminder, the lift works fine, but the tractor wouldn't move either direction. When I would try to go either direction, it would make a noise like when you turn power steering too far.
Now I have cleaned and removed the relief valves and they both are free and smooth.
Next I pulled the back plate off and drained all the fluid and removed the filter.
There was about a half inch of black sludge in the bottom.
My question is, shouldn't it roll free now that the fluid is out? I can't push it by hand at all. I jacked the back wheels off the ground and they turn easy, (one forward the other reverse) but when I drop it down, I can't move it.
I hate to fill it with Hytran and a new filter if there's some problem with the transmission.