Cat® ATF HD2 (Automatic Transmission Fluid, Heavy Duty, 2nd formulation) is Caterpillar’s latest formulation for synthetic ATF to be used in Cat Vocational trucks with automatic transmissions, or in other heavy duty automatic transmissions requiring fluid meeting the Caterpillar AT-1 specification. Cat ATF HD2 replaces the previous formulation, Cat ATF HD.

*Limited regional availability