Adjustments (LSD)

Measure steel plate and friction disc end play. Adjustment can be made by selecting friction disc thicknesses.

End play is calculated by using equation (("A" - "B") + "C") - ("D" + "E") = "X"

"A" - Depth of front differential cage contact surface to differential cage inner bottom. See Fig 1 .
"B" - Depth of front differential cage contact surface to outer flange.
"C" - Depth of rear differential cage contact surface to differential cage inner bottom.
"D" - Total thickness of pinion, pinion shaft and side gear assembly mounted in pressure ring, with steel plates and friction discs attached. See Fig. 7.
"E" - Total thickness of all 4 spacers.
"X" - End Play.

LIMITED SLIP DIFFERENTIAL FRICTION DISC & PLATE END PLAY ADJUSTMENT

Fig 1: Measuring Front & Rear Differential Cage

Courtesy of ISUZU MOTOR CO.

Fig 2: Measuring Pinion Assembly With Steel Plates & Friction Discs

Courtesy of ISUZU MOTOR CO.

Using equation, select appropriate friction discs and steel plates to correctly adjust end play while keeping number of friction discs and steel plates to specification. See Figure .
Measure side gear backlash in direction of shaft. Adjustment can be made by selecting thrust washer thicknesses. Thrust washers are available in three sizes; .059" (1.50 mm), .063" (1.60 mm), .067" (1.70 mm).

Backlash is calculated by using equation ("A" - "B") + "C" - "H" = "X"

"A" - Depth of front differential cage contact surface to differential cage inner bottom. See Fig 1 .
"B" - Depth of front differential cage contact surface to outer flange.
"C" - Depth of rear differential cage contact surface to differential cage inner bottom.
"H" - Total thickness of pinion, pinion shaft and side gear assembly mounted in pressure ring, with thrust washers attached. See Fig 3 .
"X" - Backlash.

LIMITED SLIP DIFFERENTIAL FRICTION DISC & PLATE END PLAY ADJUSTMENT

Using equation, select appropriate thrust washers to correctly adjust backlash while keeping number of thrust washers to specification. See Figure . After implementing above equation, adjust backlash gap between back surface of pressure ring and thrust washers to .002" (.05 mm) or less.

Fig 3: Measuring Pinion Assembly With Trust Washers
Courtesy of ISUZU MOTOR CO.