DIFFERENTIAL-ELSD
OPERATION
A gerotor pump (1) creates oil flow through the filter (4) whenever left and right wheels spin at different speeds and the solenoid valve is activated. The oil flow is restricted by a Pressure Regulating Valve (PRV) to build oil pressure. Pressurized oil is then fed to a piston (2) chamber. The piston compresses the clutch pack (3) providing additional torque to the lower speed wheel.
When the antilock brakes are activated the differential solenoid is switched off and pressure is bleed off the clutch pack.
REMOVAL
1. Remove differential cover.
2. Remove axle shafts.
3. Remove solenoid valve connector (1) from ELSD solenoid valve (2).
4. Mark differential housing and bearing caps (3) for installation reference.
5. Remove bearing adjuster lock bolt (3) from bearing caps.
6. Loosen differential bearing cap bolts.
7. Loosen differential bearing adjusters through the axle tubes (1) with Wrench C-4164 (3).
8. Hold differential case while removing bearing caps and adjusters.
9. Remove differential case and tag differential bearing cups and adjusters to indicate location.
10. Clean housing cavity with flushing oil, light engine oil or a lint free cloth.
NOTE: Do not use steam, kerosene or gasoline to clean the housing.
INSTALLATION
1. Apply a coat of hypoid gear lubricant to differential bearings, bearing cups and threaded adjusters.
NOTE: Grease can be used to keep the adjusters in position.
2. Install differential assembly into the housing.
3. Install differential bearing caps in their original locations.
4. Install bearing cap bolts and tighten upper bolts to 14 N·m (10 ft. lbs.). Tighten lower bolts finger-tight until the bolt head is seated.
5. Perform differential bearing preload and adjustment procedure.
6. Tighten bearing cap bolts (2) to 136 N·m (100 ft. lbs).
7. Install adjuster locks (3) on bearing caps and tighten bolts to 11 N·m (8 ft. lbs.).
8. Install axle shafts (1).
9. Install solenoid valve connector (1) to ELSD solenoid valve (2).
10. Install differential cover.