75W90 GEAR OIL - recommended for most street driven and racing differentials. Excellent performance in conventional and limited-slip units. Also for limited-slip manual transaxles which require a 90 WT oil. Contains limited-slip friction modifiers.

75W90NS - recommended for manual transmissions and non-limited-slip transaxles that recommend 90 WT oils. Can be used in racing limited-slip units to increase lockup and reduce wheel spin. Street-driven rear-wheel drive cars should use regular Red Line 75W90 or 80W140.

75W140NS - recommended for manual transmissions and non-limited-slip transaxles that recommend 140 WT oils. Can be used in racing limited-slip units to increase lockup and reduce wheel spin. Street-driven rear-wheel drive cars should use regular Red Line 75W90 or 80W140.

80W140 GEAR OIL - recommended for heavily-loaded and low-speed differentials, including limited-slip, and where reduction of limited-slip chatter or gear noise is required.

Quart Price: $9.49 / Case price: $8.37 (12QT. per case)

SHOCKPROOF^TM GEAR OIL - recommended for heavily -loaded racing differentials and transmissions which see shock-loading. ShockProof contains a unique solid dispersion which cushions gear teeth to help prevent tooth breakage and allows the use of lower viscosities. Available as SuperLight, LightWeight, and Heavy grades.
Quart Price: $11.99 / Case price: $129.48 (12QT. per case)

is a friction modifier designed to reduce limited-slip noise and to aid the proper break-in of any differential. This can be added to any gear oil to reduce temperature during break-in and prevent gear softening. Replaces manufacturers' limited-slip additives. Can be used to perfectly tune a limited-slip unit. Red Line 75W90 and 80W140 Gear Oils already contain this additive.
4 oz.  Price: $8.95