Watch your rubbers!

[Pstn head]

Yup, I think a lot of people use gear oil in there snowmobile chaincase, it’s not a gear case! it’s a chaincase.

 

[Motorhead]

Agree, I do! Thought it was the correct usage!
Remember when ATF was the choice for a while, way back when Cat chaincase oil turned into a frozen grease glob! Yeah I’m old. I now use the same oil that I use for my VP stern drive boat, and that’s 75-90 full syn with GL5 rating and no LS! Seems so much better then the Yamalube chaincase oil I used for the first few years, back when my 2017 was new!

 

[HABS 1]

Well, I went on my Quebec trip for 17 days. I parked my 2018 Sidewinder in the garage, and when I got back there was a small puddle of gear oil on the left side of the sled. I was like WTF? I unscrewed the check bolt on the chaincase cover and nothing. Tore it apart, inspected both covers, and they looked good. So, now I'm really like WTF. I look at the rubber magnet and its sticking out a millimeter. I get my finger nail behind it, and it slips right out another 5mm before I meet resistance. So, now it makes sense that there was gear oil on the left side of the sled, and nothing by the chaincase cover. It was traveling through the driveshaft. Inside of the driveshaft was all gear oil. Not sure what happened to the rubber, but I got lucky, all the gears looked fine.

i had this happen to me at the start of the season... not a good situation having gear oil on ur break pads n rotor!..machine has 1200 miles on it niw so probably had 900 shen this plug leaked... i change the oil every year even tho it dont get rode much... allways high snd synthetic oil... i just put rtv around thd plug n reinstalled it .holding fine