2004 Kubota rtv 900 won't move

I picked up a cheap rtv. Runs great but doesn't move. Did I say I picked it up cheap. The company I bought it off tried to fix it and replaced the hst case. When they resembled the trans it still didn't move. After throwing 3k blindly at it still does the same thing. Doesn't move



I put gauges on the charge pump. 35 to 44 psi at full throttle.



I'd think when the hst was changed guys would have noticed the pump plates but none the less I'll have to pull it apart





Of interest the tang on the servo valve is quite worn. Is this worth looking into first



Thanks guys!

2004 Kubota rtv 900 won't move