I want to change the rear diff fluid in my '98 Montero and I'm confused about which fluid type to use. AllData says this:

Conventional Differential
API classification GL-5 or higher

Limited-slip differential
Mitsubishi Genuine Gear Oil Part No. 8149630EX or equivalent

I have the factory air locker with the manual on/off button in the center console. Is this considered the "Conventional Differential"? I hope so, because I'm already picturing the puzzled look the and ridiculous price the dealer will give me if I have to ask for "Part No. 8149630EX or equivalent" <img src="/forums/images/graemlins/barf.gif" alt="" />