In the illustration at right, part 114 is the Remote Control Shaft inside the gearbox rear extension (which is shown on the previous page). As the hand shift lever is moved left and right, Front Selector Lever 115 moves up and down. As the hand shift lever is moved fore and aft, lever 115 moves aft and forward. This lever is choosing one of the Selectors that are attached to the three Shift Rods, and in turn moving one of the shift rods fore and aft. There is an Interlock Arm interfacing between the selector lever and the selector slots to hold two shift rods in neutral position while a third rod moves to engage the selected gear. This arrangement prevents engaging two gears at once. There is another tech page detailing How The Interlock Arm Works.

Items 62 and 63 are Ball and Spring, three of each. Item 64 is Block, shift rod aligning, attached to the rear face of the main gear case. A spring is pushed down into a blind hole in the block, followed by a ball. This ball and spring are to be depressed using a thin assembly tool punch while the shift rod is inserted through the block. When the shift rod hits the assembly punch, the punch can be withdrawn to allow the rod to pass through the block. The spring and ball are then trapped in the blind hole behind the rod. As the rod moves to the intended position, the detent ball can drop into a notch in the rod to secure the rod in place, preventing any further motion. Items 47 ,51, 56 are shifting forks for Reverse, 10-2, and 3-4 respectively. These will be pushed fore and aft by the shift rods.


The shifting forks,items 47, 51, 56, will be pushing parts 89 (reverse gear), 97 (1-2 sliding hub) and 110 (3-4 sliding hub) respectively. Items 97 and 110 sliding hub assemblies have internal ball and spring detents (98-99, 108-109) to hold them in place while they are centered in their neutral positions.

Items 95, 96 are locking pin and spring that will secure the locking ring (thrust washer) holding 3rd gear on the front end of the mainshaft. This is the locking pin that must be depressed to rotate the locking ring to release 3rd gear before parts on the front of the mainshaft can be disassembled.

See preceeding page for information on the Reverse Gear Lockout and How It Works.