transmission trouble in 970 Case,

[rockinmywaypa]

Our Case 970 with selectamatic transmission quit moving. it will not move in any gear. I don't know what to check before I say split it. we checked hydraulic pressure going to each clutch package and all are in recommended range. I've read that it could be torque limiter, is there a way to check before it is split. I may pull the selector valves off the top and see if there is anything there but I wish I had something to go looking for instead of blindly searching. Any old mechanics here that might know something about these.