SIDE BEARING ADJUSTING SHIM SELECTION Measurement point

1. | Gear carrier | 2. | Side cover |  |

1.Measure the dimension of each measuring point according to the following steps.
■ CAUTION ■
The minimum scale of measuring instrument must be 0.01 mm (0.0004 in) or less.
Measuring dimension (A) (gear carrier side)

- Install side bearing outer race to inner race, then measure dimension (L) from drive gear mounting surface to outer race edge surface with a pair of vernier calipers and straightedge.
  ■ CAUTION ■
  Consider the thickness of a straightedge.
- Measure the thickness (N) of straightedge.
- Calculate the dimension (A) from drive gear mounting surface to outer race edge surface by formula below.

  A = L - N |

  Example:
  In case of N = 5.02 mm (0.198 in), L = 153.51 mm (6.044 in)
  | A= 153.51 - 5.02 = 148.49 mm
  | (A= 6.044 - 0.198 = 5.846 in)

  ■ CAUTION ■
  Measure it in three points, then adapt the minimum.

Measuring dimension (B) (side cover side)

- Install side bearing outer race to inner race, then measure dimension (M) from drive gear mounting surface to outer race edge surface with a pair of vernier calipers and straightedge.
  ■ CAUTION ■
  Consider the thickness of a straightedge.
- Measure the thickness (N) of straightedge.
- Calculate the dimension (B) from drive gear mounting surface to outer race edge surface by formula below.

  B = M - N |

  Example:
  In case of N = 5.02 mm (0.198 in), M = 182.55 mm (7.187 in)
  | B= 182.55 - 5.02 = 177.53 mm
  | (B= 7.187 - 0.198 = 6.989 in)

  ■ CAUTION ■
  - Measure it in the condition removing drive gear.
  - Measure it in three points, then adapt the minimum.

2.Calculate the thickness of side bearing adjusting shim by formula below.

T1′ = T1 + (A - A′) |
T2′ = T2 + (B - B′) |

T1′ | : Thickness of shim after replacement (gear carrier side)
T2′ | : Thickness of shim after replacement (side cover side)
T1 | : Thickness of shim before replacement (gear carrier side)
T2 | : Thickness of shim before replacement (side cover side)
A′ | : Dimension (A) after replacement
B′ | : Dimension (B) after replacement
A | : Dimension (A) before replacement
B | : Dimension (B) before replacement

BACKLASH

1.Remove drain plug.

2.Fit a dial indicator to the drive gear face at drain hole to measure the backlash.

Backlash | : Refer to Backlash.

- If the backlash is outside the specified value, then adjust the shickness raito of shims.

  When the backlash is large:
  | Use thicker adjusting shim for the side cover side and thinner one for the gear carrier side.
  When the backlash is small:
  | Use thinner adjusting shim for the side cover side and thicker one for the gear carrier side.

  ■ CAUTION ■
  Never change the total thickness of shims. Failure to do this changes bearing preload.

TOOTH CONTACT

1.Remove differential assembly. Refer to Disassembly.

2.Apply red lead to drive gear.
■ CAUTION ■
Apply red lead to both the faces of 3 to 4 gears at 4 locations evenly spaced on drive gear.

3.Install differential assembly. Refer to Assembly.

4.Shift the parking lever of transmission assembly to a range other than the P range.

5.Install the bolts (A) to side flange, then rotate drive gear back and forth several times with a suitable bar (B). Check tooth contact between the drive pinion and the drive gear.
■ CAUTION ■
Check tooth contact both on drive side and reverse side.
■ CAUTION ■
Judge tooth contact with respect to that of the side cover side.

6.If tooth contact is improperly adjusted, use a thinner/thicker adjusting shim with respect to side bearing adjusting shim (side cover side) to the adjust tooth contact.
■ CAUTION ■

- Adjust the tooth contact within the specified value of backlash to prioritize adjustment of backlash over tooth contact.
- Never change the total thickness of shims on the side cover side and the gear carrier side.