Disassembly and Assembly: Disassembly

WARNING: This page is about a different car, the 2003 Nissan Altima and 2002 Nissan Altima. However, it is still accessible from the selected car via links, so may be relevant.

Before disassembling, measure end play of 1st and 2nd main gears.
End play standard value
1. 1st gear : 0.20 - 0.30 mm (0.0079 - 0.0118 in)
2. 2nd gear : 0.06 - 0.16 mm (0.0024 - 0.0063 in)
CAUTION: If measurement is outside the standard range, disassemble to check contact surfaces of gear, shaft, and hub. Adjust with snap ring at assembly.

Fig 1: Measuring End Play Of 1st And 2nd Main Gears
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove the snap ring.
Remove C-Ring holder, and then mainshaft C-Ring.

Fig 2: Removing Snap Ring, C-Ring Holder And Mainshaft C-Ring
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove mainshaft rear bearing.

Fig 3: Removing Mainshaft Rear Bearing
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove the snap ring.

Fig 4: Removing Main Shaft Snap Ring
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove 4th main gear and 5th main gear simultaneously.
Remove adjusting shim.
Remove 3rd-4th mainshaft spacer.

Fig 5: Removing 4th Main Gear And 5th Main Gear Simultaneously
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove 3rd main gear, 2nd main gear, 2nd needle bearing, 2nd bushing, 1st-2nd synchronizer hub assembly, 1st main gear, reverse main gear, 1st needle bearing, and 1st bushing simultaneously.

Fig 6: Removing Main Shaft Gears
Courtesy of NISSAN MOTOR CO., U.S.A.