Dodge Ram Truck 1500-2500-3500. Manual — part 133

1. Apply a thin coat of hydrated ferric oxide or equivalent, to the drive and coast side of the ring gear teeth.

2. Wrap, twist and hold a shop towel around the pinion yoke to increase the turning resistance of the pinion. This

will provide a more distinct contact pattern.

3. Using a boxed end wrench on a ring gear bolt, Rotate the differential case one complete revolution in both direc-

tions while a load is being applied from shop towel.

The areas on the ring gear teeth with the greatest degree of contact against the pinion teeth will squeegee the
compound to the areas with the least amount of contact. Note and compare patterns on the ring gear teeth to Gear
Tooth Contact Patterns chart and adjust pinion depth and gear backlash as necessary.

DIFFERENTIAL BEARING PRELOAD CHECK

The final check on the differential assembly before installing the axles is torque to rotate pinion and differential com-
bined. This will verify the correct differential bearing preload.

Torque to rotate the differential and pinion should be the torque to rotate the pinion plus 0.79-1.24 N·m (7-11 in.
lbs.).

SPECIFICATIONS

AXLE SPECIFICATIONS

DESCRIPTION

SPECIFICATION

Axle Ratio

4.56

Ring Gear Diameter

248 mm (9.75 in.)

Ring Gear Backlash

0.12-0.20 mm (0.005-0.008 in.)

Pinion Bearing Preload - Original Bearings

1-3 N·m (10-20 in. lbs.)

Pinion Bearing Preload - New Bearings

1.7-3.9 N·m (15-35 in. lbs.)

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REAR AXLE - 248RBI

DR/DH

TORQUE SPECIFICATIONS

DESCRIPTION

N·m

Ft. Lbs.

In. Lbs.

Fill Hole Plug

27

20

-

Differential Cover Bolts

48

35

-

Bearing Cap Bolts

108

80

-

Ring Gear Bolt

177

130

-

Pinion Nut

292-447

215-330

-

Pinion Mate Shaft Bolt

27

20

-

Power Hop Bracket Bolts

41

30

-

Power Hop Damper Bolt

102

75

-

DR/DH

REAR AXLE - 248RBI

3 - 365

SPECIAL TOOLS

PULLER / PRESS C-293-PA

ADAPTERS C-293-37

ADAPTERS C-293-62

FLANGE WRENCH C-3281

PILOT STUDS C-3288-B

DIAL INDICATOR C-3339

INSTALLER FLANGE C-3718

HANDLE C-4171

INSTALLER BEARING C-4190

3 - 366

REAR AXLE - 248RBI

DR/DH

PULLER C-452

INSTALLER CUP D-111

INSTALLER CUP D-146

REMOVER CUP D-158

REMOVER CUP D-162

DUMMY BEARINGS D-343

SPREADER W-129-B

REMOVER/EXTRACTOR 6310

HOLDER 6719A

PINION DEPTH TOOLS 6730

DR/DH

REAR AXLE - 248RBI

3 - 367