hi what kind of oil should i put in the front and back diffs. 90 weight gear or some other i have a 2001 a.c 4x4 thanks

 

use SAE 90 hypoid gear oil that's what the manual call's for, i've missplaced my manual so i'm not sure how much it hold's ! Go to the arctic cat page and ask bear he can tell you he has a 400 ac manual shift 4x4, i have a 2006 ac 400 fis auto with the suzuki engine/belt driven clutch, but i've missplaced my manual................williebee

 

Owners manual states "80W-90 hypoid oil". I like the idea of synthetic, but it's your choice.

 

do you use synthitic in your ac i like the idea of it to just curious what you using

 

Yes, I use the synthetic in the crankcase and the differentials. I like the extended oil changes and the extra heat resistance protection that the synthetic gives.

 

Use Amsoil[img]i/expressions/face-icon-small-happy.gif[/img]

 

I've been using the Arctic Cat oil change kits, mainly because I'm lazy and the kits have everything I need to get the job done.