TM 5-3810-300-24 & P2
Remove the reverse gear washer from the mainshaft.
Block the right countershaft against the side of the case
and move the mainshaft assembly to the rear. Tilt the
front of the shaft up and lift the assembly from the case.
Use caution as the reverse gear is free and can fall from
the shaft during removal. Remove the reverse gear
from the mainshaft.