Component Description

Manual Transmission - MTX75

Component Description

Selector Mechanism

The selector mechanism is the link between the transmission shift cables and the transmission. It is externally mounted on the transmission and is consists of levers and rods which control the shift forks inside the transmission. The shift and selector cables connect to levers on the outside. The selector mechanism is replaced as an assembly.

Input Shaft

The input shaft is the main shaft splined to the clutch disc and turns the gears in the transmission.
The gears on the input shaft and mesh with the output shaft gears and provide torque from the engine to the differential.
The input shaft has two tapered roller bearings. Input shaft end play is controlled by a selective shim located under the bearing cup.

Output Shaft

The output shaft transfers torque to the ring gear, pinion gears, and differential.
The output shaft has a gear for each drive gear, including reverse. These gears are free to spin around the output shaft. The synchronizers engage the gears locking them to the output shaft.
The output shaft has two tapered roller bearings. Output shaft end play is controlled by a selective shim located under the bearing cup.

Differential

The ends of the differential are supported on tapered roller differential bearings. The cups for these differential bearings are seated in the transaxle case and the flywheel housing. Differential bearing preload is set using a selective differential bearing shim that is installed under the differential bearing cup in the transaxle case.
The differential includes the differential side gears and the shaft mounted differential pinion gears. Direct contact between the gears and the differential case is prevented by the differential side gear thrust washers installed under the gears. The differential pinion shaft is held in position by a differential pinion shaft lock pin that extends through the end of the differential pinion shaft and the differential case.
The speedometer drive gear is also mounted on the differential case. It is located between the tapered roller differential bearing and the differential case. A tab on the speedometer drive gear and a matching slot in the differential case prevent the speedometer drive gear from spinning on the differential case.
The differential has two tapered roller bearings. Differential end play is controlled by a selective shim located under the bearing cup.

Synchronizer

The synchronizers are designed to act as the torque carrying interfaces between each speed gear and corresponding output shaft. The synchronizer design and function are similar to manual transaxle operations.
Gear pre-selection is made by sliding the synchronizer sleeve towards a speed gear. This causes the internal splines of the synchronizer sleeve to bridge a gap between the output hub and the external spline feature of the speed gear, thus transmitting speed and torque between the gear and output shaft. Synchronizers are small cone wet friction clutches mounted to the transaxle output shaft. They are used to bring the rotation speed of the engaging speed gear in sync with the output shaft speed. After synchronous speed has been attained the final power flow connection is made possible and the synchronizer sleeve is permitted to pass by and engage the external spline teeth on the speed gear.