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Input Shaft, Main Shaft, Countershaft, Reverse Sliding Gear Shaft, and Engaging Lever Rod a. Check all shafts for straightness by placing be-    tween points. Maximum runout shall be not    greater than 0.002 inch. Some shafts can be    straightened with a press. I If not, replace. b. Check splines for damage. Use a fine file, emery, or     stone to remove burrs or nicks. c. Check that threads on main shaft and counter-    shaft are not damaged. Replace shaft if threads    are stripped. d. Check that bearing surfaces are free from burrs,     nicks or galling. Use a fine stone or emery to clean. e. Check engaging lever rod for straightness and wear.     Replace if worn or bent.
Gears a. Check that teeth on all gears are not chipped,     broken, or     galled. Replace if damaged. b. Check that synchro crown teeth are flat and not     rounded.    Rounded teeth indicates worn gear.     Replace. Also replace    mating gear. c. Check that wear pattern is even. Replace if worn.d.    Check that bearing surfaces are free from burrs,     nicks or galling. Use fine emery to clean.e. Check    that clearance between reverse sliding gear bushing      and reverse shaft is 0.002 to 0.004 inch. Replace     bushing if worn. f.  Check that clearance between first gear and its     bushing is 0.002 to 0.004 inch. Replace if worn. g. Check that clearance between second and third     gears and seats on main shaft is 0.002 to 0.004     inch. Replace if worn.
Synchros a. Check that synchro is not cracked. Replace if    cracked. b. Check that teeth are not broken. Replace if broken. c. Check bearing surfaces for excessive wear. Replace     if worn.