Red Line Heavy Shockproof Gear Oil 75w140 Redline Ester Synthetic 1 Quart 946 ml
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View our feedbackRed Line Heavy ShockProof Gear Oil is a premium ester-based synthetic gear lubricant developed for racing, off-road and high-load drivetrain applications.
It provides film thickness greater than an SAE 75W-250 gear oil with internal friction comparable to a 75W-90, offering outstanding shock-load protection and minimal drag.
Used worldwide in racing differentials, sequential gearboxes, off-road transmissions, and even motorcycle gearboxes where extreme protection is required. Also suitable for many Harley-Davidson models, including use in the gearbox or primary chain case of Big Twin and Sportster bikes (check your owner’s manual for viscosity compatibility).
Not recommended for most synchronised car gearboxes due to its ultra-low friction formulation.
Red Line Heavy Shockproof Gear Oil is available in 1 US Quart bottles (946 ML)
It provides film thickness greater than an SAE 75W-250 gear oil with internal friction comparable to a 75W-90, offering outstanding shock-load protection and minimal drag.
Used worldwide in racing differentials, sequential gearboxes, off-road transmissions, and even motorcycle gearboxes where extreme protection is required. Also suitable for many Harley-Davidson models, including use in the gearbox or primary chain case of Big Twin and Sportster bikes (check your owner’s manual for viscosity compatibility).
Not recommended for most synchronised car gearboxes due to its ultra-low friction formulation.
Red Line Heavy Shockproof Gear Oil is available in 1 US Quart bottles (946 ML)
Red Line ShockProof Gear Oils feature a patented suspension of microscopic solid particles within a fully synthetic ester base oil. This unique chemistry provides exceptional cushioning of metal-to-metal contact — essential for racing or heavy-duty driveline use.
Key Benefits:
Key Benefits:
- Exceptional protection under extreme shock loads
- 250 % higher load-carrying capacity than conventional gear oils
- Reduces wear, pitting, and noise in high-stress gearsets
- Low drag for improved efficiency and cooler operation
- Maintains protection even in splash-lubricated systems
- Greatly reduces friction and operating temperature
- Racing and rally differentials
- Off-road and endurance transmissions
- Drag racing rear ends (spools and lockers)
- Harley-Davidson Big Twin & Sportster gearboxes or chain cases
- Film thickness greater than SAE 75W-250
- Friction losses similar to SAE 75W-90
- Designed for splash or wet-sump lubrication
1 × US Quart (946 ml) Bottle of Red Line Heavy ShockProof Gear Oil
Suitable for:
- Competition differentials & transmissions – road, track, drag & off-road
- Detroit Lockers, spools, limited-slip units
- Motorcycle gearboxes – including Harley-Davidson Big Twin, Sportster, and Buell applications where high-load or shock conditions exist
- Classic and custom drivetrain systems requiring extreme film strength
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