Ford F150 Pickup. Instruction - part 1866

MANUAL TRANSMISSION 

The M5OD is a top-shifted, fully synchronized, five speed instruction transmission, equipped with an overdrive 
fifth gear ratio. All gear changes are accomplished with synchronizer sleeves. 

M5OD Instruction Transmission 

 

2003 Ford Pickup F150 

2003 TRANSMISSIONS Instruction Transmission - F150 Pickup

  

Fig. 4: External View Of Instruction Transmission M50D
Courtesy of FORD MOTOR CO. 

The case (7005), case cover (7222) and the extension housing (7A039) 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 Label (located on the driver door lock pillar) lists applicable transmission 
identification codes. 

Tag, Service Identification 

 

2003 Ford Pickup F150 

2003 TRANSMISSIONS Instruction Transmission - F150 Pickup

  

Fig. 5: Locating Service Identification Tags
Courtesy of FORD MOTOR CO. 

Instruction transmissions are also equipped with service identification tags. 

Instruction transmissions are also equipped with service identification tags. The M5OD tag is located on the driver 
side of the transmission. 

POWERFLOW 

Powerflow is accomplished with a series of gears 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 (7Z115) 
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 (2GR)(7102) 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 inout 
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. 

DIAGNOSIS & TESTING 

MANUAL TRANSMISSION 

Refer to MANUAL TRANSMISSION, CLUTCH & TRANSFER CASE - F150 PICKUP . 

GENERAL PROCEDURES 

 

2003 Ford Pickup F150 

2003 TRANSMISSIONS Instruction Transmission - F150 Pickup

  

BEARINGS - INSPECTION

1. Inspect bearing for bent cage. 

Fig. 6: Inspecting Bearing For Bent Cage 
Courtesy of FORD MOTOR CO. 

2. Inspect bearings for galling (metal smears on roller ends). 

z

Galling is caused by overheat, poor lubrication or overload.  

z

If galling is found, replace bearing and inspect seals. 

NOTE:

If any of the following conditions exists, replace the bearing.

 

2003 Ford Pickup F150 

2003 TRANSMISSIONS Instruction Transmission - F150 Pickup