Differential Case and Ring Gear - Model 70, Limited Slip: Assembly
WARNING: This page is about a different car, the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Soak the clutch packs for 20 minutes in friction modifier before assembly.
- Place the side gear ring on the pinion flange. Coat the rear axle disc and plate kit with lubricant and place it on the side gear ring.
- Use rear axle lubricant or friction modifier.
- Install the side gear ring, the rear axle disc and plate kit, and the side gear in the flange half of the differential case.
- Align the clutch pressure plate lugs, and install the side gear ring, the clutch pack, and differential side gear in the button half of the differential case.
- Place the differential pinion shaft and differential pinion gears in the button half of the differential case.
- Install the other differential pinion shaft and differential pinion gears in the flange half of the differential case.
- Assemble the differential case.
- Place the button half of the differential case onto the flange half of the differential case assembly.
- Install the bolts. Turn each one in a few threads.
- Tighten the bolts evenly and alternately.
CAUTION: The bolts must be clean and dry. - If assembled correctly, each differential pinion shaft will fit tight on its ramp. Clearance between the differential pinion shaft and the ramp must not be more than 0.254 mm (0.010 inch) and it must be equal at all four ends of the differential pinion shafts.
- If removed, install the differential ring gear.
- Tighten the Grade 9 bolts to 176 Nm (130 lb-ft).
CAUTION:
After assembly, make sure that the side gear splines engage the clutch pack splines and the differential side gear is fully seated.
Fig 2: Installing Side Gear Ring, Rear Axle Disc And Plate Kit, And Side Gear In Flange Half Of Differential Case
NOTE:
For vehicles operating at close to their GVW rating, typically emergency vehicles and vehicles equipped with a fifth wheel, there may be circumstances of continuing chatter/bumping in turns despite the installation of new parts and lubricant. In cases such as this, it is permissible to reassemble the rear axle disc and plate kit with the clutch disc adjacent to the differential side gear ring, resulting in two clutch plates together. This results in three friction surfaces instead of the normal five, lowering the torque to rotate the wheel by 40 percent.
Fig 3: Installing Side Gear Ring, Rear Axle Disc And Plate Kit, And Side Gear In Flange Half Of Differential Case
CAUTION:
Align the match marks made during disassembly.
CAUTION:
Align the match marks made during disassembly.
CAUTION:
Align the match marks made during disassembly.