OIL HARLEY DAVIDSON-DRAG SPECIALTIES TRANSMISSION / GEAR SAE 85W-140 OIL FOR BIG TWIN Recommended for use in 4-, 5- and 6-speed Harley-Davidson Big Twin transmissions Formulated specifically for high-performance gear boxes Outstanding film strength providing excellent wear protection and durability Exceptional extreme pressure additive package Provides smooth shifting across all rpm Specifically blended for hot weather applications Meets and exceeds API GL-5 classification