What kind of gear lube should I use?

Discussion in '1973-1991 K5 Blazer | Truck | Suburban' started by '73 K5, Apr 12, 2000.

  1. '73 K5

    '73 K5 1/2 ton status

    Feb 17, 2000
    Likes Received:
    I'm getting all my gears, axles and stuff installed tomorrow. Finally.
    I'm putting an Eaton limited slip in the rearend and was wondering what kind of gear lube y'all are using. I know I need one that has an LSD additive, but what brands? Also, should I get a synthetic or just a regular one.
    One more thing. The Eaton website said that if you use a synthetic gear lube, that you should NOT use an RTV sealant to put the diff. cover back on. OK, fine, but what else is there. I thought all those sealants were about the same as RTV. What else is there besides just the thin crappy gasket?

    '73 K5
    Chevy good...Ford bad

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