D30 Powerlocks and Parts
Positraction chatter is normal for limited slip and positraction differentials. Both rear tires must measure the same height from the ground to the top of the wheel in order for the differential to function properly without premature wear. Limited slip additive or friction modifier for limited slip differentials must be used with the oil to reduce postraction chatter in the event that the oil is changed.
Mechanical locking differentials can bang and clunk during normal operation. Both connected tires must measure the same height from the ground to the top of the wheel in order for a locking differential to function properly.
Remanufactured D30 Powerlock 27 spline, Used case, New disc kit, new gear set. Includes additive—-$600.00
D30 Powerlock disc kit/clutch pack with 2 tapered discs —- $120.00
D30 all new 27 spline gear set, clutch pack included ——— $400.00
To understand more about the Powerlock differential you can visit the Willys Motor Service Bulletin no.500 here: