ARB RD93 - Manual (Page 12)

3 Installing the Air Locker
10
3.1 Mounting the Ring Gear
IMPORTANT:
Higher ratio gearing uses deeper (thicker) ring gears with teeth
that extend much further. Make sure the teeth of the ring gear will
not obstruct the removal of the cross shaft when fitted. If so,
ARB recommends that you grind just enough off of one of the
ring gear teeth to successfully remove the cross shaft.
DO NOT MODIFY THE CROSS SHAFT!
IMPORTANT:
Newer OEM Chrysler 8.25” ring and pinion sets use 7/16” bolts.
The flange holes of the Air Locker must be reamed from
Ø3/8” to Ø7/16” to suit.
NOTE : If your existing differential was fitted with a toner
ring it will need to be removed and installed onto the
Air Locker before the ring gear can be mounted.
See your vehicle service manual.
Apply a thin film of high pressure grease to the ring gear shoulder
of the Air Locker to prevent seizing.
Thoroughly clean any thread locking compound or other foreign
matter from the holes of the ring gear, the threads of the ring gear
bolts, and the mating surfaces between the ring gear and the Air
Locker flange.
HINT : Stoning the ring gear mounting face before
installation will remove any high spots around the
threads.
Heat the ring gear to between 80 and 100
°C [175 - 212°F] in hot
water or in an oven to slightly expand the gear and facilitate
assembly.
NOTE : NEVER HEAT GEARS WITH A FLAME! This could
damage the hardened surface of the gear and result
in premature wear or failure.
Dry the gear and bolt holes with compressed air (if wet).
Install the ring gear onto the Air Locker by aligning the bolt holes
and then gently tapping it around in a circle with a soft mallet.
Avoid using the bolts to pull down the ring gear as this puts excess
strain on the bolts and the differential flange.