Geartrain

DESCRIPTION
The MTX-75 has the following characteristics:
^ All gear pairs, including reverse, are synchronized helical gears.
^ Input and output shafts mounted are in preloaded taper roller bearings.
^ Three separate gear shaft assemblies are used:
- input gear shaft
- output gear shaft
- reverse idler gear shaft

OPERATION
Input
Engine torque is transferred from the clutch to the input shaft. The gears for third and fourth speed (each with a needle bearing) and the third/fourth synchronizer are mounted on the input shaft. First, second and reverse gear teeth are part of the input shaft. The gears for first, second, fifth and reverse (each with a needle bearing) and the first/second and fifth/reverse gear synchronizers are mounted on the output shaft. Third and fourth gear teeth are part of the output shaft.
Overdrive
The fifth gear range provides an overdrive ratio, in which the input speed (rpm) from the engine is less than the transaxle output speed to the differential.
Reverse
Reverse is accomplished by moving the output shaft mounted 5th/reverse synchronizer assembly to engage the reverse gear. The reverse idler gear reverses the direction of the output shaft rotation.
Neutral
In neutral, none of the gears are locked to their shafts through the synchronizer assemblies. No torque from the engine to the input shaft is transferred to the differential assembly.
Output
The output shaft incorporates the pinion gear, which is constantly engaged with the final drive ring gear on the differential assembly.
The gear ratios are as follows:
1st Gear, Teeth: 12/41 Ratio: 3.42:1
2nd Gear, Teeth: 22/47 Ratio: 2.14:1
3rd Gear, Teeth: 29/42 Ratio: 1.45:1
4th Gear, Teeth: 36/37 Ratio: 1.03:1
5th Gear, Teeth: 43/33 Ratio: 0.77:1
Reverse Gear, Teeth: 13/29 Ratio: 3.42:1
Final Drive, Teeth: 15/61 Ratio: 4.06:1