Mainshaft End Play

WARNING: This page is about a different variant/trim than selected.

When adjusting mainshaft end play, select adjusting shim (1) for mainshaft rear bearing (2). To select adjusting shim, measure clearance "M" between transaxle case (3) and dummy adjusting shim (4) on mainshaft rear bearing. Refer to "MAINSHAFT REAR BEARING ADJUSTING SHIM ".
1. 5 : Snap ring
2. 6 : Mainshaft
CAUTION: Only 1 adjusting shim can be selected.
Calculate dimension "P" (thickness of adjusting shim) using the following procedure to satisfy specification of end play for mainshaft rear bearing.

Fig 1: Measuring Clearance "M" Between Transaxle Case And Dummy Adjusting Shim
Courtesy of NISSAN MOTOR CO., U.S.A.

End play : Refer to "MAINSHAFT REAR BEARING ADJUSTING SHIM ".

Dimension "P" = (M + N) - End play

P : Thickness of adjusting shim

M : Distance between dummy adjusting shim on mainshaft rear bearing end face and transaxle case end face

N ^* : Thickness of dummy adjusting shim

^* : Refer to the latest parts information to use a dummy adjusting shim of which part number is the thinnest in thickness. Refer to "MAINSHAFT REAR BEARING ADJUSTING SHIM ".

Install transaxle case following the procedures below.
1. Temporarily install snap ring of mainshaft rear bearing into transaxle case.
  CAUTION: Never reuse snap ring.
  
  Fig 2: Identifying Snap Ring
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Install dummy adjusting shim (1) to mainshaft assembly.
  
  Fig 3: Identifying Dummy Adjusting Shim
  Courtesy of NISSAN MOTOR CO., U.S.A.
3. With shifter lever A (1) held in the position shown in the figure, temporarily assemble transaxle case to clutch housing.
  CAUTION: Never damage striking rod oil seal.
  
  NOTE: Make sure to hold shifter lever A in the position shown in the figure. Otherwise transaxle case cannot be installed to clutch housing.
  
  Fig 4: Identifying Shifter Lever Position
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. While rotating shifter lever A (1) in the direction of the arrow shown in the figure, assemble transaxle case to clutch housing.
  2 : shifter lever B
  
  Fig 5: Identifying Shifter Lever Position
  Courtesy of NISSAN MOTOR CO., U.S.A.
5. Accessing from the bore plug hole, expand snap ring at mainshaft rear bearing so that the ring catches the periphery of mainshaft rear bearing.
6. Temporarily tighten transaxle case mounting bolts.
  
  Fig 6: Identifying Snap Ring At Mainshaft Rear Bearing
  Courtesy of NISSAN MOTOR CO., U.S.A.
Shift the shifter lever A to 2nd gear position.
NOTE:
- The 2nd gear position is attained when shifter lever A (1) is in the position shown in the figure.
  
  Fig 7: Shifting Shifter Lever A To 2nd Gear Position
  Courtesy of NISSAN MOTOR CO., U.S.A.
- When transaxle is shifted to the 2nd gear position, mainshaft assembly (1) is lifted.
Fig 8: Identifying Main Shaft Assembly Lifting Position
Courtesy of NISSAN MOTOR CO., U.S.A.
Seat snap ring in the groove on mainshaft rear bearing. If snap ring is not seated in the groove on mainshaft rear bearing, remove transaxle case and repeat the procedure 1 from step c.
Shift the shifter lever A to 1st gear position, and then shift it to 2nd gear position. Repeat 3 times.
NOTE:
- The mainshaft rear bearing position will be stabilized by shifting between 1st gear position and 2nd gear position alternately.
- The 1st gear position is attained when shifter lever A (1) is in the position shown in the figure.
  
  Fig 9: Shifting Shifter Lever A To 1st Gear Position
  Courtesy of NISSAN MOTOR CO., U.S.A.
- When transaxle is shifted to the 1st gear position, mainshaft assembly (1) is declined.
Fig 10: Identifying Mainshaft Assembly Position While Shifted To 1st Gear
Courtesy of NISSAN MOTOR CO., U.S.A.
Set the dial indicator (A) to dummy adjusting shim (1) through the bore plug mounting hole.
1. 2 : Mainshaft rear bearing
2. 3 : Snap ring
  
  Fig 11: Identifying Dial Indicator (A) To Dummy Adjusting Shim
  Courtesy of NISSAN MOTOR CO., U.S.A.
Shift the shifter lever A (1) to 2nd gear position (A), and then rotate it in the direction of the arrow (C) in the figure until it stops. Using this position as the reference point, measure the amount of movement when shifting shifter lever A to 1st gear position (B) and rotating it in the direction of the arrow (D) in the figure until it stops. This measurement is the "M" dimension.
When measurement "M" is 0 - 0.06 mm (0 - 0.0024 in), adjustment terminates, and the dummy adjusting shim becomes regular adjusting shim. Select adjusting shim from the computed expressions when measurement "M" is over 0.06 mm (0.0024 in).

Fig 12: Identifying Shifting Lever Position
Courtesy of NISSAN MOTOR CO., U.S.A.