Backlash Inspection on Vehicle

Raise the vehicle on a lift.
Shift to neutral.
Make a reference mark (A) across the No. 1 propeller shaft (B) and the transfer companion flange (C).

Fig 1: Reference Mark No. 1 Propeller Shaft & Transfer Companion Flange With Torque Specifications
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Separate the propeller shaft from the transfer assembly.
Set a dial indicator (A) on the transfer companion flange (B), then measure the transfer gear backlash.
Standard: 0.06-0.16 mm (0.002-0.006 in.)

Fig 2: Identifying Dial Indicator & Transfer Companion Flange
Courtesy of AMERICAN HONDA MOTOR CO., INC.
If the measurement is not within the standard, remove the transfer assembly (see TRANSFER ASSEMBLY REMOVAL ) and inspect the transfer assembly (see TRANSFER ASSEMBLY INSPECTION ).
Check for fluid leaks between the mating surfaces of the transfer assembly and transmission.
If there is a leak, remove the transfer assembly from the transmission (see TRANSFER ASSEMBLY REMOVAL ), and replace the O-ring. Also check for fluid leaks between the mating surfaces of the transfer housing and transfer holder. If there is a leak, remove the transfer holder, and replace the O-ring.
Check for leaks between the transfer companion flange and transfer oil seal.
If there is a leak, remove the transfer assembly from the transmission (see TRANSFER ASSEMBLY REMOVAL ), and replace the transfer oil seal and O-ring on the transfer output shaft. If oil seal and O-ring replacement is required, you will need to check and adjust the transfer gear tooth contact, transfer gear backlash, the tapered roller bearing starting torque, and the total starting torque (see 35 MM THRUST SHIM SELECTION ).