Carrier Bearing Preload Adjustment

Special Tools Required 

Preload Inspection Tool 070AJ-0020101

If any of the items listed below were replaced, the carrier bearing preload must be adjusted.

• Transmission housing
• Clutch housing
• Differential carrier
• Spacer
• Carrier bearing and outer race

1. Disassemble the transmission (see TRANSMISSION DISASSEMBLY  ).
2. Install the 81 mm shim, the spacer, and the bearing outer race into the transmission housing, and install the spacer and the bearing outer race into the clutch housing, if they are removed (see BEARING OUTER RACE REPLACEMENT  ).
   NOTE:

   • The tapered roller bearing and the bearing outer race compose the carrier bearing are always should be a set. Do not combine the other one.
   • Note the thickness size of the used 81 mm shim.
3. Install the differential carrier with the tapered roller bearing, and assemble the transmission housing and the clutch housing using the 10 mm flange bolts by specified tightening torque (see step  27).
   NOTE: It is not necessary to use sealing agent between the housings for this adjustment.
4. Rotate the differential assembly in both directions to seat the carrier bearings.
5. At normal room temperature, measure the starting torque of the differential assembly by rotating it in both directions using the preload inspection tool (A) and a torque wrench (B).
   Fig 1: Measuring Starting Torque Of Differential Assembly By Rotating It In Both Directions Using Preload Inspection Tool And Torque Wrench

   Courtesy of AMERICAN HONDA MOTOR CO., INC.
6. If the carrier bearing preload is not within the standard, select an 81 mm shim that will provide the correct preload:
   • Compare the bearing preload you got on the first try with the standard preload of 3.43- 4.51 N.m (35-46 kgf.cm, 30-40 lbf.in).
   • If the preload you measure was less than standard, subtract it from the standard preload.
   • If the preload you measure was more than standard, subtract the standard preload from the preload you measure.

   Standard: 3.4- 4.5 N.m (35-46 kgf.cm, 30-40 lbf.in) 

7. Subtract the appropriate thrust shim thickness from the middle of the standard preload: 4.0 N.m (41 kgf.cm, 36 lbf.in).
   NOTE:

   • Each shim size up or down from standard makes about 0.3- 0.4 N.m (3- - 4 kgf.cm, 2.6- 3.5 lbf.in) difference in preload.
   • Assemble only one 81 mm shim. Do not install two or more 81 mm shim combined.

   Example 1 (measured preload was less than the standard): 

   Measured preload: 2.1 N.m (21 kgf.cm, 18 lbf.in) with a 2.50 mm (0.098 in) thrust shim:

   (1) Standard 4.0 N.m (41 kgf.cm, 36 lbf.in)

   - Measurement 2.1 N.m (21 kgf.cm, 18 lbf.in)

   1.9 N.m (20 kgf.cm, 17 lbf.in) less

   The subtracted preload was 1.9 N.m (20 kgf.cm, 18 lbf.in) less than the standard, so you need a shim five sizes thicker than in measured (try the 2.65 mm (0.104 in) 81 mm shim, and recheck).

   Example 2  (measured preload was more than the standard):

   Measured preload: 4.8 N.m (49 kgf.cm, 43 lbf.in) with a 2.50 mm (0.098 in) thrust shim:

   (2) Standard 4.8 N.m (49 kgf.cm, 43 lbf.in)

   - Measurement 4.0 N.m (41 kgf.cm, 36 lbf.in)

   0.8 N.m (8 kgf.cm, 7 lbf.in) more

   The subtracted preload was 0.8 N.m (8 kgf.cm, 7 lbf.in) more than the standard, so you need a shim two sizes thinner than in measured (try the 2.44 mm (0.096 in) 81 mm shim, and recheck).

   81 MM SHIM
   
   

   Type	Thickness
   A	2.05 mm (0.081 in)
   B	2.08 mm (0.082 in)
   C	2.11 mm (0.083 in)
   D	2.14 mm (0.084 in)
   E	2.17 mm (0.085 in)
   F	2.20 mm (0.087 in)
   G	2.23 mm (0.088 in)
   H	2.26 mm (0.089 in)
   J	2.29 mm (0.090 in)
   K	2.32 mm (0.091 in)
   L	2.35 mm (0.093 in)
   M	2.38 mm (0.094 in)
   N	2.41 mm (0.095 in)
   P	2.44 mm (0.096 in)
   Q	2.47 mm (0.097 in)
   R	2.50 mm (0.098 in)
   S	2.53 mm (0.100 in)
   T	2.56 mm (0.101 in)
   U	2.59 mm (0.102 in)
   V	2.62 mm (0.103 in)
   W	2.65 mm (0.104 in)
   X	2.68 mm (0.106 in)
   Y	2.71 mm (0.107 in)
   Z	2.74 mm (0.108 in)
   AA	2.77 mm (0.109 in)
   AB	2.80 mm (0.110 in)
   AC	2.83 mm (0.111 in)
   AD	2.86 mm (0.113 in)
   AE	2.89 mm (0.114 in)
   AF	2.92 mm (0.115 in)
   AG	2.95 mm (0.116 in)
   AH	2.98 mm (0.117 in)
   AJ	3.01 mm (0.119 in)
   AK	3.04 mm (0.120 in)
   AL	3.07 mm (0.121 in)
   AM	3.10 mm (0.122 in)
   AN	3.13 mm (0.123 in)
   AP	3.16 mm (0.124 in)

8. Replace the 81 mm shim to appropriate one (see BEARING OUTER RACE REPLACEMENT  ).
9. With the appropriate size 81 mm shim installed in the transmission housing, check the initial preload again to verify the preload is within the standard.
10. Reassemble the transmission (see TRANSMISSION REASSEMBLY  ).