Posi Lube In Rear Diff

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    Author Topic: Posi Lube In Rear Diff  (Read 2743 times)

    Offline daveh

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    Posi Lube In Rear Diff
    « on: April 01, 2009 - 08:54:31 AM »
    Hey guys I have a 3:23 posi in my Challenger that I recently bought. My question is I'm not certain if the previous owner put in the additive for the posi or not. I'm going to put a tube in just in case my question is will it hurt if there was some in there already and I add more? I don't think so but I'm not certain. Thanks

    Dave
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    Offline Moparal

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    Re: Posi Lube In Rear Diff
    « Reply #1 on: April 01, 2009 - 12:15:29 PM »
    I would think not, but if you were worried, you could drain it all and redo it all again yourself. That would actually put your mind at ease.  But I never heard a unit failing for putting in a little extra before
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    Offline Changin Gears

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    Re: Posi Lube In Rear Diff
    « Reply #2 on: April 01, 2009 - 12:38:24 PM »
    If it's not chattering when turning, I would leave it alone.  Either it has the additive, the gear oil used has the additive or the sure grip is worn enough that it doesn't require it.
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    Offline burnt orange

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    Re: Posi Lube In Rear Diff
    « Reply #3 on: April 01, 2009 - 07:06:41 PM »
    I'd drain it and refill it. 
    I have been using GM posi fluid and additive, draining and refilling every 5 or 6 years.  Seems to work.
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    Offline JS27N0B

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    Re: Posi Lube In Rear Diff
    « Reply #4 on: April 01, 2009 - 11:02:04 PM »
    I would run it as is unless it starts to chatter on corners.

    I can't belive nobody has said this yet but you won't ever find a Chrysler diff with a "posi" in it, only GM's. The correct name is Sure Grip or the common name of limited slip.
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    Offline 340Challman

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    Re: Posi Lube In Rear Diff
    « Reply #5 on: April 01, 2009 - 11:09:47 PM »
    Quote from: JS27N0B on April 01, 2009 - 11:02:04 PM
    I can't belive nobody has said this yet but you won't ever find a Chrysler diff with a "posi" in it, only GM's. The correct name is Sure Grip or the common name of limited slip.

    Are you "posi" tive?   :poopoke: :stirpot: :bigsmile:
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    Offline BIGSHCLUNK

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    Re: Posi Lube In Rear Diff
    « Reply #6 on: April 01, 2009 - 11:18:35 PM »
    for  sure!!!  :roflsmiley:
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    Offline JS27N0B

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    Re: Posi Lube In Rear Diff
    « Reply #7 on: April 01, 2009 - 11:53:47 PM »
    Quote from: BIGSHCLUNK on April 01, 2009 - 11:18:35 PM
    for  sure!!!  :roflsmiley:

    You guys need to get a grip!   :roflsmiley:
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    Offline Chryco Psycho

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    Re: Posi Lube In Rear Diff
    « Reply #8 on: April 02, 2009 - 01:04:28 AM »
    Quote from: Changin Gears on April 01, 2009 - 12:38:24 PM
    If it's not chattering when turning, I would leave it alone.  Either it has the additive, the gear oil used has the additive or the sure grip is worn enough that it doesn't require it.

     :iagree:
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    Offline hooD

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    Re: Posi Lube In Rear Diff
    « Reply #9 on: April 02, 2009 - 01:54:36 AM »
    This topic made me think about my rear end.  My cuda's rear end. 
    I put a 3rd member unit (3.91 sure-grip) in it back in 1976.  I haven't done anything to it since. 
    So I guess it might be a good idea to drain and refill it. 

    What brand and weight of gear lube should I use and how much will I need?  Do I need to add any sure-grip additives?  And how do I drain it?
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    Offline BoughtItNew

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    Re: Posi Lube In Rear Diff
    « Reply #10 on: April 02, 2009 - 05:43:30 PM »
    Quote from: JS27N0B on April 01, 2009 - 11:53:47 PM
    You guys need to get a grip!   :roflsmiley:

    For Sure!
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