Hummer H3. Manual — part 1540

Tighten: Tighten the VSS to 17 N.m (12 lb ft).

Fig. 280: Locating Output Shaft Seal - RWD
Courtesy of GENERAL MOTORS CORP.

80. If RWD transmission, using the J 45868 , install a new output shaft seal. See Special Tools.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 281: Identifying Output Shaft Seal - 4WD
Courtesy of GENERAL MOTORS CORP.

81. If 4WD transmission, using the J 45867 , install a new output shaft seal. See Special Tools.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

Fig. 282: View Of Drain Plug
Courtesy of GENERAL MOTORS CORP.

82. Install the drain plug with a new gasket.

Tighten: Tighten the drain plug to 37 N.m (27 lb ft).

DESCRIPTION AND OPERATION

TRANSMISSION SYSTEM DESCRIPTION AND OPERATION

General Description

The Aisin AR5 is a 5 speed transmission with 5th gear being an overdrive ratio. All gear positions

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3

are synchronized. There are two versions of the AR5, RWD and 4WD. The operation is the same
for both transmissions. The differences are the RWD has a longer extension housing and output
shaft. In addition, the RWD has a speed reluctor wheel on the output shaft for the vehicle speed
sensor. The transmission uses 4 aluminum housings. The clutch housing is removable. Roller ball
bearings support the input shaft, countershaft and output shaft. No shimming is required. For
proper set up, select thickness retaining rings are used. All of the speed gears use needle bearings.
The AR5 uses a special 75W-90 transmission fluid. Lubrication to the input and output shafts are
by splash. An oil receiver at the rear of the countershaft lubricates the 5th gear synchronizer and
bearing. On the RWD transmission, an oil trough delivers transmission fluid to the rear bushing.

Shifting Operation

Fig. 283: Shifting Operation
Courtesy of GENERAL MOTORS CORP.

2007 Hummer H3

2007 TRANSMISSION Manual Transmission - Aisin AR5 - H3