Disassembly And Assembly

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

Forward and overrun clutches are serviced essentially the same way as reverse clutch is serviced. However, note the following exceptions.

Check of forward clutch operation

Fig 1: Applying Compressed Air To Oil Hole
Courtesy of NISSAN MOTOR CO., U.S.A.
Check of overrun clutch operation

Fig 2: Checking Overrun Clutch Operation
Courtesy of NISSAN MOTOR CO., U.S.A.
Removal of forward clutch drum
Remove forward clutch drum from transmission case by holding snap ring.

Fig 3: Removing Forward Clutch Drum From Transmission Case By Holding Snap Ring
Courtesy of NISSAN MOTOR CO., U.S.A.
Removal of forward clutch and overrun clutch pistons
1. While holding overrun clutch piston, gradually apply compressed air to oil hole.
  
  Fig 4: Applying Compressed Air To Oil Hole To Forward Clutch And Overrun Clutch Pistons
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Remove overrun clutch from forward clutch.
  
  Fig 5: Removing Overrun Clutch From Forward Clutch
  Courtesy of NISSAN MOTOR CO., U.S.A.
Removal and installation of return springs

Fig 6: Removing/Installing Return Springs
Courtesy of NISSAN MOTOR CO., U.S.A.
Inspection of forward clutch and overrun clutch return springs
Inspection standard: Refer to SDS, RETURN SPRINGS .

Fig 7: Inspecting Forward Clutch And Overrun Clutch Return Springs
Courtesy of NISSAN MOTOR CO., U.S.A.
Inspection of forward clutch drive plates
Thickness of drive plate:

Standard 1.52 - 1.67 mm (0.0598 - 0.0657 in)

Wear limit 1.40 mm (0.0551 in)

Fig 8: Inspecting Forward Clutch Drive Plates
Courtesy of NISSAN MOTOR CO., U.S.A.
Inspection of overrun clutch drive plates
Thickness of drive plate:

Standard 1.90 - 2.05 mm (0.0748 - 0.0807 in)

Wear limit 1.80 mm (0.0709 in)

Fig 9: Inspecting Overrun Clutch Drive Plates
Courtesy of NISSAN MOTOR CO., U.S.A.
Installation of forward clutch piston and overrun clutch piston
1. Install forward clutch piston by turning it slowly and evenly.
  - Apply ATF to inner surface of clutch drum.
    
    Fig 10: Installing Forward Clutch Piston By Turning It Slowly And Evenly
    Courtesy of NISSAN MOTOR CO., U.S.A.
  - Align notch in forward clutch piston with groove in forward clutch drum.
    
    Fig 11: Aligning Notch In Forward Clutch Piston With Groove In Forward Clutch Drum
    Courtesy of NISSAN MOTOR CO., U.S.A.
2. Install overrun clutch by turning it slowly and evenly.
  - Apply ATF to inner surface of forward clutch piston.
    
    Fig 12: Applying ATF To Inner Surface Of Forward Clutch Piston
    Courtesy of NISSAN MOTOR CO., U.S.A.
  - Measurement of clearance between retaining plate and snap ring of overrun clutch
    Specified clearance: Standard
    
    1.0 - 1.4 mm (0.039 - 0.055 in)
    
    Allowable limit 2.0 mm (0.079 in)
    
    Retaining plate: Refer to SDS, FORWARD CLUTCH .
    
    Fig 13: Measuring Clearance Between Retaining Plate And Snap Ring Of Overrun Clutch
    Courtesy of NISSAN MOTOR CO., U.S.A.
  - Measurement of clearance between retaining plate and snap ring of forward clutch
    Specified clearance: Standard
    
    0.35 - 0.75 mm (0.0138 - 0.0295 in)
    
    Allowable limit Model 4EX16, 4EX79 (2WD)
    
    2.15 mm (0.0846 in)
    
    Model 4EX17, 4EX23, 4EX80, 4EX81 (4WD) 2.35 mm (0.0925 in)
    
    Retaining plate: Refer to SDS, FORWARD CLUTCH .
    
    Fig 14: Measuring Clearance Between Retaining Plate And Snap Ring Of Forward Clutch
    Courtesy of NISSAN MOTOR CO., U.S.A.