I bought a tg1860 at auction from a dealer and the trans is weak. Only moved forward and reverse with low rpms. Wouldn't move at all at high rpms. I tore it apart and could tell someone had been in there and maybe left a few small pieces out of it. Pump and motor block and pistons are tight. Bypass valve felt loose. I looked up parts diagrams and seen a couple ball bearings and springs not in my hydraulic valve body that the pump and motor ride on. I ordered those but I'm not 100 percent certain where they go. A small bearing with spring I found fits under a small plate. The larger ball and spring goes under one of the 2 brass valve or maybe I need another set of the larger bearing and spring. Any help is appreciated. I'll attach a picture if anyone needs one. Thanks!