What kind of fluid do you put in the gear box on your coolster atv3150dx?

For the Coolster ATV 3150DX, it's recommended to use automatic Transmission Fluid (ATF) for the gearbox. Specifically, look for a fluid that meets the specifications of Dexron III or similar. Always consult the owner's manual for the exact fluid type and capacity to ensure optimal performance and longevity of the ATV.