Clutch type limited slip differentials rely on a friction modifier in the gear oil. Refill the axle without it and the clutch packs grab instead of slipping smoothly, which is what produces the low speed chatter and groan owners hear in tight turns. One bottle goes in after the fresh lubricant, and it takes only a few miles of driving to notice the difference.

Usage Notes:

• Friction modifier for clutch type limited slip differentials such as Trac-Lok units.
• Add one bottle to the axle after draining and refilling with the specified gear lubricant.
• Meets the Mopar MS-10111 material standard.
• Not intended for selectable or automatic locking differentials, which do not use an additive.
• 4 ounce bottle, sold individually. Contains hazardous material, so shipping restrictions apply.