ARB RD81 - Manual (Page 7)

2 Removing the Existing Differential
5
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 in the air, release the parking brake and leave the
vehicle in neutral. Chock the wheels if necessary.
2.2 Differential Fluid Drain
Clean around the differential cover seal to prevent dirt from entering
the differential.
Position a fluid drain reservoir under the differential and loosen all
differential cover retaining bolts.
Gently pry the cover away from the differential housing to completely
drain all differential fluid.
Once drained, remove differential cover.
HINT : This is a good time to check for metal particles in
your oil and in the bottom of the housing which may
indicate a worn bearing or differential component.
2.3 Removing the Axles
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. 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.