Case780 shuttle pressure

Hi everyone I got an 81 case 780, with what I believe a forward reverse shuttle shift problem. That may be caused by clutch disconnect, but I’m not positive.

When shifting to forward or reverse I loose transmission hydraulic fluid pressure and transmission seems to slip if I try moving it. Anyone have same problem? Or any advice would be greatly appreciated!!! One suggestion was what a broken spring possibly in the disconnect. Manual is on the way. I also changed tch fluid, filter, and...

Case780 shuttle pressure

Case780 shuttle pressure