Manual Transaxle

Manual Transmission
The M50D is a top-shifted, My synchronized, five speed manual transmission, equipped with an overdrive fifth gear ratio. All gear changes are accomplished with synchronizer sleeves.

MM5OD Manual Transmission





The case, case cover and the extension housing are constructed of aluminum alloy. Steel bearing race inserts provide durability in appropriate areas. The extension housing contains a bronze alloy bushing that can not be replaced. The extension housing must be replaced if the bushing is damaged.

Transmission Identification
The Vehicle Safety Compliance LAW (located on the driver door lock pillar) lists applicable transmission identification codes.

Tag, Service Identification





Manual transmissions are also equipped with service identification tags. The M50D tag is located on the driver side of the transmission.

Powerflow
Powerflow is accomplished with a series of gem and synchronizers.
In Neutral there is no powerflow through the transmission.
In first gear, the first/second synchronizer sleeve locks the first gear to the output shaft. The input gear drives the countershaft. First gear on the countershaft turns first gear on the output shaft which is driven in reduction at a 3.90:1 ratio.
In second gear, the first/second synchronizer sleeve locks the second gear to the output shaft. The input gear drives the countershaft. Second gear on the countershaft: drives on the output shaft. The output shaft is driven in reduction at a 2.25:1 ratio.
In third gear, the third/fourth synchronizer sleeve locks the third gear (3GR) to the output shaft. The input gear drives the countershaft. Third gear on the countershaft drives third gear on the output shaft. The output shaft is driven in reduction at a 1.49:1 ratio.
In fourth gear, the third/fourth synchronizer sleeve locks the fourth gear (4GR) to the output shaft. The input gear and output shaft turn at the same speed (1:1 ratio).
In fifth gear, the fifth/reverse synchronizer sleeve locks the fifth gear (5GR) to the countershaft. The input gear drives the countershaft. Fifth gear on the countershaft drives fifth gear on the output shaft. The output shaft is overdriven at a ratio of 0.80:1.
In reverse gear, the fifth/reverse synchronizer sleeve locks the reverse gear to the countershaft The input gear drives the countershaft. The countershaft reverse gear drives the reverse idler gear. The reverse idler gear drives the reverse gear on the output shaft. The output shaft is driven in the opposite direction of the input shaft at a ratio of 3.91:1.