Rear Axle - 248RBI
DIFFERENTIAL-TRAC-LOKDESCRIPTION
The Trac-Lok(R) differential has a one-piece differential case and similar components as a standard differential, plus two clutch disc packs (1) attached to the side gears (3) with retainers (2) (4). Differential bearing preload and ring gear backlash are adjusted with shims located between the differential case bearing cups and housing. Pinion bearing preload is set and maintained by the use of a collapsible spacer.
OPERATION
This differentials clutches are engaged by two concurrent forces. The first being the preload force exerted through Belleville spring washers within the clutch packs (6) (8). The second is the separating forces generated by the side gears (7) as torque is applied through the ring gear.
This design provides the differential action needed for turning corners and for driving straight ahead during periods of unequal traction. When one wheel loses traction, the clutch packs transfer additional torque to the wheel having the most traction. This differential resist wheel spin on bumpy roads and provide more pulling power when one wheel loses traction. Pulling power is provided continuously until both wheels lose traction. If both wheels slip due to unequal traction, Trac-lok(R) operation is normal. In extreme cases of differences of traction, the wheel with the least traction may spin.