This is a problem I have had for a while. Rebuilt engine clutch, TA works, I have not had it apart. Engine flywheel has been resurfaced with the correct step height of 2.188". "Correct" clutch pedal free play is 1 3/8", I have it adjusted to about 2" to keep the clutch fingers from touching the release bearing when the clutch is engaged---I suppose this could mean that the flywheel has been ground too many times, but the clutch DOES disengage. Gears will shift without clashing (provided I let the gears stop turning after pushing in clutch) with the connecting rod between the clutch and TA levers disconnected. With that rod connected there is excessive gear clash. Gears will shift but always with some clash. TA is adjusted to spec, along with various "out of spec" adjustments to try to quiet the gears. I had the main clutch fork brazed, and bushings put in the attaching holes in the clutch rod to remove slop in the linkage. There is still about 1/2" movement in the linkage before the fingers move to disengage the clutch, there was about an inch before repairs. Clutch sleeve and release and pilot bearings are new, the old sleeve was badly worn. With the TA inspection cover removed the TA clutch disengages with the lever pulled back or the engine clutch disengaged. The transmission stops turning when the engine clutch is disengaged, and connecting lever disconnected. When connected, gears clash with the TA lever forward or back. Why do the gears turn with the TA connected and the engine and TA clutches disengaged?