What weight Synthetic oil for the chain case???

[Iceman57]

I'm changing my lower gear to a 40 tooth and want to go with synthetic oil in the chain case. Can anyone tell me what weight I should go with??

 

[n2oiroc]

75w90. make sure you use gear lube, not amsoil chaincase lube. it is like water!

 

[Iceman57]

Is Mobil 1 ok to use in the chain case?

 

[pro116]

chaincase oil

mrance111 yes mobil is fine.

 

[zipclean]

Used Amsoil for 25 years and not one chain case problem,or leak if sealed properly.Runs way cooler.

 

[msatow]

Zipclean, are you currently using Amsoil chaincase oil in your yamaha? And how long have you been using it? I just changed my track and installed Amsoil in the chaincase. I thought it looked thin comparied to what came out.

 

[n2oiroc]

yamaha recommends 75w90 gear lube. would you put strait 10w oil in the engine?

 

[APEX 21]

4,089 miles on my Apex ER with Amsoil, 7,000 miles on my RX-1. I've had 0 chaincase problems.

 

[Sled Dog]

Guys any oil would work in a chaincase! Full synthetic is the way to go if you want better lubrication and a cooler running chaincase. Synthetic all the way.

 

[msatow]

I did a viscosity test with the Amsoil Chaincase Lube and Mobile One synthetic 75-90 gear lube and they are too close to worry about.

 

[bgbytoys]

yamaha reccomends a hypoid oil, but we have used a 80/90 non hypoid no problem.

 

[Yamahammer485]

What does Hypoid mean anyways?

My 2002 Honda 350 fourtrax 4x4 requires this oil in the rear final gear and front diff. Iv been using a sythetic oil in it and it works like a champ, never had a problem, but I think its non-hypoid.

 

[bgbytoys]

hypoid is for high presseure areas like your differential gears.

 

[SledderSteve]

What does Hypoid mean anyways?

http://yarchive.net/car/hypoid_gear_oil.html