Check the listing for details. HAPCO - Limited Slip Additive - REDUCES WEAR & NOISE IN DIFFERENTIALS - 2 PACK. Condition: New. Listed at 27.98 USD. Limited Slip Additive - 2 PACKUse to reduce wear, noise and chatter in differentialsProvides extreme pressure-wear resistance in any fluid systemDoes not contain petroleum distillatesWill not harm any sealsAlso safe for: electric motors, hydraulic pumps, moving shafts, power mowers and pillow blocks Hapco Limited Slip Additive effectively reduces wear, noise and chatter in differentials. Our formula helps provide extreme pressure-wear resistance in any fluid system. Will not harm seals and does not contain petroleum distillates. For Best Results: Add one 4 oz. bottle of Limited Slip Additive when gear oil is changed or unusual slip is detected. Drive vehicle as normal to allow circulation of fluids. Also safe for: electric motors, hydraulic pumps, moving shafts, power mowers and pillow blocks. Size - 4 oz. - 2 Pack Part No. - 4104P2 Made In USA - Money Back Guarantee - Proven Results Since 1960 Visit HapcoProducts.com to learn more!