ARB RD99 - Manual (Page 8)

2 Removing the Existing Differential
6
2.1 Vehicle Support
Safely secure the vehicle on a hoist. We recommend supporting
the vehicle on a chassis hoist to keep the differential area at a
convenient working height and to leave the wheels and axles free
to be rotated and removed.
Once supported off the ground, release the parking brake and
leave the vehicle in neutral. Chock the wheels if necessary.
2.2 Differential Fluid Drain
HINT : This is a good time to check for metal particles in
your oil, on your drain plug, or in the bottom of the
housing which may indicate a worn bearing or
differential component.
Clean any loose dirt from around the differential third member
flange area, the filler plug area, and the drain plug to avoid
contaminating the differential cavity with abrasive particles.
Position a fluid drain reservoir under the differential.
Remove the drain plug and completely drain all differential oil from
the housing.
IMPORTANT :
COLLISION DAMAGE OR HEAVY OFF-ROAD USE OF YOUR VEHICLE
IN THE PAST MAY HAVE RESULTED IN SOME DEGREE OF BENDING
IN THE AXLE HOUSING. ANY MISALIGNMENT OF THE AXLE TUBES
MAY RESULT IN EXCESSIVE WEAR AND/OR FAILURE OF YOUR
DIFFERENTIAL AND AXLE SHAFTS. ARB STRONGLY RECOMMENDS
THAT YOU HAVE YOUR AXLE ASSEMBLY INSPECTED FOR
CONCENTRICITY AND STRAIGHTNESS BEFORE INSTALLING
YOUR AIR LOCKER.