High-Reverse & End Play

Assemble high-reverse (front) and forward (rear) clutches, front internal gear, front planetary carrier and connecting shell. Secure thrust bearings with petroleum jelly. Install assembly into transmission case.
Parts must be properly seated for front and total end play measurements to be accurate. To measure high-reverse (front) clutch end play, use dial gauge or caliper with 7" base. First, measure from rear hub thrust bearing race to case (dimension "A"). See Fig 1 .

Fig 1: Measuring Dimension "A"
Courtesy of NISSAN MOTOR CO., U.S.A.
Assemble high-reverse (front) clutch and forward (rear) clutch drum assemblies together and lay flat on bench. Make sure rear hub thrust bearing is properly seated. Measure from the front face of the clutch drum to the top of the thrust bearing race (dimension "B"). See Fig 2 .

Fig 2: Measuring Dimension "B"
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
On L3N71B transmissions, measure from top of oil pump shaft to installed gasket (dimension "C"). Install thrust washer. Measure from top of oil pump shaft to thrust washer (dimension "D"). See Fig 3 .

Fig 3: Measuring Dimensions "C" & "D" (L3N71B)
Courtesy of NISSAN MOTOR CO., U.S.A.
On L4N71B and JM600 transmissions, measure between top of drum support shaft (high-reverse clutch and forward clutch side) to installed gasket (dimension "C"). Install thrust washer. Measure from top of drum support shaft (high-reverse clutch and forward clutch side) to thrust washer (dimension "D"). See Fig 4 .

Fig 4: Measuring Dimensions "C" & "D" (E4N71B, L4N71B & JM600)
Courtesy of NISSAN MOTOR CO., U.S.A.
First, subtract .004" (.1 mm) from dimension "A". Then subtract dimension "B" from result. Note this result. Then subtract dimension "D" from dimension "C". The result of sum ("A" minus .004" (.1 mm) minus "B"), less sum "C" minus "D", is high-reverse (front) clutch end play.
Front end play range is .020-.031" (.5-.8 mm). Front end play can be adjusted by changing thicknesses of high-reverse (front) clutch thrust washers. These washers are available in thicknesses from .051-.106" (1.3-2.7 mm) in .008" (.2 mm) increments.
Total end play is result of sum, "A" minus .004" (.1 mm), less dimension "C". Total end play range is .0098-.0197" (.25-.50 mm). Change total end play with oil pump cover bearing races of different thicknesses. Bearing races are available in thicknesses of .047-.087" (1.2-2.2 mm) in .08" (.2 mm) increments.