Search results

FYI , this is the rear gearcase housing that appears to use a ring gear, hoping that is also OK going with the Amsoil ATV Differential fluid (Amsoil shows it is compatible, but wanting to verify here, too): https://www.partzilla.com/catalog/yamaha/atv/2001/big-bear-4wd-yfm40fn/drive-shaft...

Thank you for your help on this, I am going to try the Amsoil ATV/UTV Transmission & Differential fluid and see how it goes. I already had my eye on their 4-stroke 0w-40 oil anyway for the engine.

This one looks very interesting, I just noticed that Amsoil now has a vehicle lookup for ATVs, never knew that. And on there it lists this very same item for the differentials on the ATV we have. Thanks for this, so far this seems like a good way to go.

I'm certain that the OEM fluid has been changed as we are not the original owners of this ATV so I don't have a way to verify what is in it is even correct anyway. Basically at this point I'm looking to just do a complete lube change as we just got it and no idea when it was changed last.

Hello, I know there are previous topics on this, but looking for a current recommendation. I have a 2001 Yamaha ATV that recommends "SAE80 API GL-4 Hypoid gear oil" for the differentials. So far based on reading here, the closest alternative I have found so far is Redline 75W80. I was also...