1. #1
    Craig's Avatar
    Craig is offline Senior Member
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    Hey. It's time for me to change my diff fluid since my rearend rebuild. I have a Detroit locker back there now. Just wondering if I should be using a different kind of diff fluid and if the different kinds will change the way the locker engauges/disengauges?

  2. #2
    88Wrangles's Avatar
    88Wrangles is offline Senior Member
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    use the same type of diff fluid as normal...but also put in an additive for the locker. Just go to an auto parts store and they have it there right next to the diff fluid.

  3. #3
    redrooster's Avatar
    redrooster is offline Senior Member
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    RE: engine dies? is it overheating?

    Never heard that before. I have been running mine on 80W90 for years without problems. The only time I know that you need to additive is if you are running a limited slip or a Detroit Gearless. The standard Detroits work fine with 80W90.
    Safety yellow and Handicap blue CJ with 5.3 Vortec/TH400/Tons/Atlas/Roks/Locks and Airshocks.
    1622 Miles from Moab.

  4. #4
    88Wrangles's Avatar
    88Wrangles is offline Senior Member
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    Quote Originally Posted by redrooster
    Never heard that before. I have been running mine on 80W90 for years without problems. The only time I know that you need to additive is if you are running a limited slip or a Detroit Gearless. The standard Detroits work fine with 80W90.
    Woops, my bad. I guess I was too quick to reply and wasn't even thinking

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