MTX75

Manual Transaxle





MTX-75 Transaxle - 2.0L.





MTX Transaxle - 2.3L

The MTX-75 manual transaxle is a 2-shaft transaxle.
MTX-75 means:
- M: Manual
- I: Transmission
- X: Transaxle (front wheel drive)
- 75: Distance between input and output shaft in mm.

The aluminum transaxle housing comprises two closed sections. Additional reinforcement ribbing has been added to the transaxle housing to reduce noise and vibrations.

All the gear wheels in the 2-shaft transaxle are in constant mesh. In each gear the required transaxle ratio is achieved by means of a pair of gear wheels.

When reverse gear is selected, an idler gear changes the direction of rotation of the output shaft.
The input and output shafts run in roller bearings.

To further improve stability and gear shifting, the selector mechanism has been revised to incorporate a maintenance-free cable operating mechanism.

All the gear wheels, including reverse gear, are bevel-cut, synchronized and run on needle roller bearings.

The first and second gears are dual-synchronized.





Transmission Changes

Input and Output Shaft





General View of the Input and Output Shaft
In neutral, none of the gears are connected to the input or output shaft via the relevant synchronizer unit. No torque is transmitted to the differential.

The input and output shafts are each seated in one roller bearing in the transaxle housing section on the clutch side and one roller bearing in the transaxle housing section on the transaxle side.

The output drive pinion is in constant mesh with the differential drive annulus.

The third and fourth gear wheels and the third and fourth gear synchronizer are located on the input shaft. The gearing for first, second and reverse gears is an integral part of the input shaft.

The first, second, fifth and reverse gear wheels and the first and second gear synchronizer and fifth and reverse gear synchronizer are located on the output shaft. On vehicles built up to 07/2000 the gearing for third and fourth gear is an integral part of the output shaft.

Differential
The main components of the differential are:
- Output gear wheel
- Spur gear
- Four pinions at right angles to one another
- Differential housing with two roller bearings

The transaxle and differential are installed in a two-part aluminum housing which is flange-mounted to the engine.
The input shafts have serrated teeth and are securer with a snap ring.

The torque is transmitted from the spur gear to the halfshafts via two differential pinions mounted on the differential pinion shaft.

When cornering, the drive wheels need to turn at different speeds as the drive wheels travel different distances. This is achieved by means of the differential pinions which turn on their own shaft and mesh with the halfshaft pinions turning at different rates.

Power Flow





First Gear





Second Gear





Third Gear





Fourth Gear

Part 1:

Part 2:

Fifth Gear





Reverse Gear





Reverse Gear Idler
The reverse gear idler is driven by the input shaft. Its function is to reverse the direction of rotation of the output shaft in reverse gear.

The reverse gear idler is located on the idler gear shaft together with a needle roller bearing.





Selector Interlock Mechanism
The selector interlock mechanism and the selector finger are mounted on a sleeve in the selector mechanism housing and keep the selected gear engaged with the aid of a spring-loaded ball until another gear is selected.

The selector interlock mechanism has three positions.
The reversing lamp switch is mounted on the side of the selector mechanism housing.

General Illustrations





Input Shaft

Part 1:

Part 2:

Part 3:

Output Shaft