Adjustment of Differential Case (With LSD)

ADJUSTMENT OF DIFFERENTIAL CASE (WITH LSD)





1. End play of friction disc and friction plate can be calculated by using following equation and should be adjusted within following range.
^ Adjustment can be made by selecting friction disc or friction plate having three different thicknesses.
E=A-(B+C) (one side)
End play E: 0.05 - 0.15 mm (0.0020 - 0.0059 inch)
A: Length of differential case contact surface to differential case inner bottom.
B: Total thickness of friction discs, friction plates, spring plate and spacer in differential case on one side.
C: Length of differential case contact surface to back side of side





2. Measure values of the length of differential case contact surface to differential case inner bottom.
Standard length A: 49.50 - 49.55 mm (1.9488- 1.9508 inch)





3. Measure thickness of each disc and plate. Number of discs and plates (One side), Friction disc 5, Friction plate 6 and Spring plate 2.
Total thickness "B": 18.57 - 20.43 mm (0.7311 - 0.8043 inch)
No. of discs and plates (One side)
Friction disc:2
Friction plates:5
Spring plates:2
Spacer: 1
4. Measure values of the length of differential case contact surface to back side of side gear.





a. Attach a dial indicator to the base plate.
b. Place differential case B on the base plate, and install a master gauge on case B.
^ Then adjust the dial indicator scale to zero with its tip on the master gauge.





c. Install pinion mate gears, side gears and pinion mate shaft in differential case B.
d. Set dial indicator tip on the rear of side gear, and read the indication.
Example:
E=A-D=A-(B+C)=0.05 to 0.15 mm
A = 49.52 mm
B = 19.45 mm
C = 29.7 mm
D = B + C
49.15 (D) = 19.45 (B) + 29 7 (C)
E = A - D
0.37 (E) = 49.52 (A) - 49.15 (D)
From the above equation, end play of 0.37 mm exceeds the specified range of 0.05 to 0.15 mm.
Select suitable discs and plates to adjust correctly.