noticed tractor started slipping while driving, though maybe clutch was worn out, spilt tractor into, clutch still looked good, noticed discs was lil wet, was no discoloration on disc nor on flywheel from slipping., noticed oil leak was from clutch housing support , replace seal an put tractor back together , replaced both hyd. an trains. filters an hyd. suction screen was clean too . refilled hyd. an trains an started up tractor an hyds went rite to work, put tractor in gear an forward gear an it creeped along, flipped to reverse an it creeped backwards. tried changing from high to low range an it still wouldn't hardly pull, hydraulics work fine just want drive. I know the trains pump feeds the main hyd. pump,,, an I dout that both forward an reverse clutch packs are both blown out, (what are the odds) is there a valve that's sticking somewere, is there a plug somewere to read trains. pressure , also are there plugs to remove to read both the clutch packs pressures for forward an reverse. don't have a service book either, thanks guys.
shuttle valve is on lower right front corner of transmission. It has a main pressure port on bottom of front cover and a port for reverse and forward on top of valve unit. Pressure on main should be 170-180 psi and same for clutch packs when engaged. Get an I&T manual for a 2350 JD farm tractor (JD 58) as it is the frame which TLB is built upon.