Thrust Clearance Inspection

NOTE: If the transmission housing, the flywheel housing, the final drive shaft, the secondary driven gear, or the final drive shaft bearing is replaced, the final drive shaft thrust clearance must be adjusted with a 25 x 35 mm thrust shim.

Install the secondary driven gear (A) on the final drive shaft (B), then install the final drive shaft in the transmission housing. Install the existing 25 x 35 mm thrust washer (C).

Fig 1: Identifying Final Drive Shaft Thrust Clearance
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Final Drive Shaft Cutaway View

Fig 2: Cutaway View Of Final Drive Shaft
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the distance (D) between the transmission housing surface and the thrust shim surface on the final drive shaft, then note the measurement (measurement D).
Measure the distance (E) between the flywheel housing surface and the bearing inner race surface, then note the measurement (measurement E).

Fig 3: Measuring Distance Between Flywheel Housing Surface And Bearing Inner Race Surface
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Final Drive Shaft Bearing Cutaway View

Fig 4: Cutaway View Of Final Drive Shaft Bearing
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Calculate the final drive shaft thrust clearance using the formula:
Clearance

= Measurement D-Measurement E+Flywheel housing gasket thickness

Standard: 0-0.15 mm (0-0.006 in)

NOTE: The standard of the clearance includes thickness of the flywheel housing gasket (0.5 mm, 0.02 in)
If the clearance is out of standard, remove the 25 x 35 mm thrust shim, and measure its thickness.

Select a new 25 x 35 mm thrust shim from the following table and install it, then recheck that the clearance is within the standard.

THRUST SHIM, 25 x 35 mm

THRUST SHIM SPECIFICATION

No.	Thickness
A	2.80 mm (0.110 in)
B	2.90 mm (0.114 in)
C	3.00 mm (0.118 in)
D	3.10 mm (0.122 in)
E	3.20 mm (0.126 in)
F	3.30 mm (0.130 in)
G	3.40 mm (0.134 in)
H	3.50 mm (0.138 in)
I	3.60 mm (0.142 in)
J	3.70 mm (0.146 in)
K	3.80 mm (0.150 in)
L	3.90 mm (0.154 in)
M	4.00 mm (0.157 in)