Transfer Gear Backlash Measurement

Raise the vehicle on a lift, and make sure it is supported securely.
Shift the transmission into N.
Make a reference mark (A) across the propeller shaft (B) and the transfer companion flange (C).

Fig 1: Locating Reference Mark On Propeller Shaft And Transfer Companion Flange
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Separate the propeller shaft from the transfer companion flange.
Set a dial indicator (A) on the transfer companion flange (B); position the dial indicator tip (C) on the direct extension of the bolt hole center (D).

Fig 2: Positioning Dial Indicator Tip (C) On Direct Extension Of Bolt Hole Center
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the transfer gear backlash.
Standard: 0.06-0.16 mm (0.0024-0.0063 in)
If the transfer gear backlash is out of the standard, replace the transfer assembly.