Assembly

FIG. 18 Clutch Installed in Drive Gear Case Half- Model 70:

1. Place the side gear ring from the drive gear half of the case on a pinion flange (Fig. 18) or something similar, so that it is about four inches above the bench. Coat the clutch plates with axle lubricant, Hypoid Gear Lubricant, C6A-Z-19580-E (ESW- M2C105-A) or equivalent Additive Friction Modifier C8AZ-19B546-A (EST-M2C118-A).

CAUTION: If the plates are of the newer design (without concentric grooves), it is important to soak them for twenty minutes in Additive Friction Modifier C8AZ-19B546-A (EST-M2C118-A) before assembly.

FIG. 16 Limited-Slip Differential (Model 70)-Exploded View. Design with Special Surface Coating on Plates, Two Dished Discs, and Flat Plates:

2. Refer to Fig. 16 and assemble the parts in the order indicated for the particular axle model being repaired.

FIG. 18 Clutch Installed in Drive Gear Case Half- Model 70:

3. Place the ring gear half of the case over the clutch pack and side gear ring. Make sure that the clutch plate lugs enter the slots in the case and that the case bottoms on the clutch pack (Fig. 18).

4. Grasp the flange and the case to hold the assembly together, and then turn the case half upside down.

5. Place the proper side gear in the side gear ring.

FIG. 19 Mate Shaft Installed-Model 70:

6. Place the mate shaft and pinions on the side gear ring (Fig. 19). Align the mate shaft and case markings.

7. Install the cover half mate shaft and pinions. Align the point markings.

8. Place the side gear on the pinions, and then place the side gear ring on the side gear and pinions.

FIG. 20 Plate and Disc Arrangement-One Side of Model 70-Limited-Slip with Special Coated Plates and Two Dished Discs:

9. Assemble the clutch pack on the side gear according to the arrangement shown in Fig. 20. Align the clutch plate lugs, and install all parts in the case.

NOTE: There may be circumstances of continuing chatter/bumping in turns despite replacement of parts and lubricant, particularly in vehicles operating at close to GVW rating. Typical situations are emergency vehicles and fifth wheel trailers. In these cases, it is permissible to re-assemble the clutch pack with the disc adjacent to the side gear ring, resulting in two plates together. This results in 3 friction surfaces instead of the normal 5, and will result in lowering the torque to rotate the wheel by 40%.

10. Place the cover half of the case over the assembly (Fig. 15). Align the case marks made before disassembly.

11. Install all the case bolts and turn each one on a few threads. Case bolts must be clean and dry.

FIG. 21 Spline Alignment of Side Gear and Side Ring:

Using both axle shafts, align the splines of the side gear and the side gear ring (Fig. 16) on both sides of the case. With the axle shafts in position, tighten the case bolts evenly and alternately to 89-94 N m (65-70 ft-lb) (Fig. 21).

NOTE: If bolt heads have "180" or 7 radial lines stamped on head, tighten the case bolts to 122- 136 Nm (90-100 ft-lbs).

12. Remove the axle shafts. If the assembly has been properly assembled, each pinion mate cross shaft should be tight on its ramp; or, if there is clearance between the cross shaft and the ramp, it should be not more than 0.254mm (0.010 inch) and equal at all four cross shaft ends.