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Rating: 1
Confused about rear diff fluid type... #960401 08/24/09 06:33 PM
Joined: Apr 2009
Posts: 120
Western MD
WigWiggy Offline OP
Wheeler
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="" />

98 Montero, 184k.
Re: Confused about rear diff fluid type... [Re: WigWiggy] #960402 08/24/09 07:19 PM
Joined: Jan 2000
Posts: 16,227
Bay Area, CA
off-roader Offline
Web Wheeler
*****
I don't believe the locker calls for an LSD (friction modifier) additive. I believe 8149630EX is gear oil plus this additive already added but I'd wait to hear back from other's who change their own fluids. <img src="/forums/images/graemlins/baby.gif" alt="" />

<img src="/forums/images/graemlins/lol.gif" alt="" />
Re: Confused about rear diff fluid type... [Re: WigWiggy] #960403 08/24/09 07:35 PM
Joined: Jan 2009
Posts: 243
Las Vegas, NV
H
hochkis Offline
Wheeler
Quote
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="" />


Air locker only requires GL-5 gear oil. The friction modifier is only needed with the Limited Slip differential.

95 Montero SR- Stock
90 Turbo Miata - TD04 wrx turbo, Flyin miata suspension, Torsen diff, 225 RS3's
92 Mighty Max 4x4 - Retired
Re: Confused about rear diff fluid type... [Re: hochkis] #960404 08/24/09 08:12 PM
Joined: Apr 2009
Posts: 120
Western MD
WigWiggy Offline OP
Wheeler
Thanks for confirming - I'll happily go with the GL-5!

98 Montero, 184k.
Re: Confused about rear diff fluid type... [Re: WigWiggy] #960405 08/24/09 09:15 PM
Joined: Jan 2001
Posts: 13,649
Helen , GA
fasteddy Offline
Web Wheeler
*****
The additive is a friction modifier, so you don't get judder in tight turns with an lsd. No need for a locker, since there aren't clutches automatically applied in a corner...

Not responsible for advice not taken...

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