How to Change Snowmobile Chaincase Oil

For best snowmobile performance, change the chaincase oil every year. Over time, the oil level can drop or the oil can accumulate metal particles from the chain and gears, placing the sled at risk of failure. It’s best to change chaincase oil at the end of the season. That way your sled is ready to go in the fall.

Tools you need to change snowmobile chaincase oil

  • Oil-drain pan
  • Ratchet and correct-sized socket for your sled
  • Funnel (if necessary)
  • Chaincase oil

Time needed: 20 minutes.

How to change chaincase oil in a snowmobile

  1. Drain the chaincase oil

    Locate and remove the drain plug. Examine the oil as it drains. If you notice a silver color, it means the chain and gears have produced metallic particles. This is normal. A chain and gears will generate some metal. However, failure to change the oil yearly allows metal particles to circulate and lead to accelerated wear. That’s why it’s vital to change chaincase oil yearly.

  2. Replace the drain plug

    Once the oil has drained completely, ensure the gasket on the drain plug is in good shape and replace the plug. Check your owner’s manual for torque specifications. If there are none, tighten snugly and avoid over-tightening.

  3. Add new chaincase oil

    Now it’s time to install the new chaincase oil. Remove the fill plug. The location of the fill plug varies depending on your snowmobile. Check your owner’s manual for the location. Position a rag beneath the fill hole to avoid spills. Fill the chaincase. Use a funnel if necessary.

    With the sled used in the video demonstration, the chaincase reservoir is full when oil runs out of the fill hole. Some snowmobile manufacturers specify the amount of oil to install, so check your owner’s manual for the proper quantity. Replace the fill plug and wipe down the area.

That’s all there is to changing snowmobile chaincase oil. It’s an easy maintenance practice that will help you get the most years and best performance from your sled.

What is the Best Snowmobile Oil? – AMSOIL Blog

Which snowmobile chaincase oil should I use?

Sometimes, enthusiasts use automatic transmission fluid or gear lube, but it’s best to use an oil specifically engineered to meet the demands of enclosed chaincases and gearcases. You also want to use a synthetic fluid that provides extreme-pressure protection and low-temperature fluidity for superior performance and protection.

AMSOIL Synthetic Chaincase & Gear Oil is a 100 percent synthetic formulation that resists shear and chemical breakdown better than conventional fluids. Its superior base oils and additives provide long-lasting protection.

  • Extreme-pressure additives promote long chain and gear life
  • Inhibits rust and oxidation
  • Low-temperature fluidity ensures maximum energy efficiency
  • Lasts longer than conventional oils
  • Recommended for use in Arctic Cat® Diamond Drive gearcases
Snowmobile chaincase oil.

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