A quart of ISO 220 synthetic gear oil. ISO 220 is a heavy gear-oil viscosity — the grade for enclosed gearboxes that run under load, which on a trailer means the jack mechanism, the coupler gearing, and on a rig the winch gearbox and any geared reduction.

Synthetic base, so it holds its viscosity across a much wider temperature swing than a mineral gear oil and does not shear down as fast under load. The practical upside is longer intervals and a gearbox that still turns smoothly on a cold morning.

Specs

• ISO 220 viscosity grade
• Synthetic base
• 1 quart
• Manufacturer part number 54200
• Shipping weight: 2 lb

Bundle and save on shipping. Small parts like this ship in the same box as the rest of your order — add a few to one order and you pay shipping once.