1. 68383GTS

    68383GTS Well-Known Member

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    What do you guys use for suregrip additive? Also how much to you add to your gear lube? It has been about 12 years or so since I have swapped out a 3rd member. Going from a 410 locker to a 355 suregrip...
     
  2. RustyRatRod

    RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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    I use one container of the Ford friction modifier. It's about the best on the market.
     
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    • 68383GTS

      68383GTS Well-Known Member

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      Like 4 oz?
       
    • RustyRatRod

      RustyRatRod Bla de blizhibliz de blatde blizi bla bla FABO Gold Member

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      Yes. I always mix it all together with the gear oil and then dump it in. That way it's already mixed together.
       
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      • Rmoore

        Rmoore Well-Known Member

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        You can also buy Royal Purple gear lube ! It is already in the oil ! But it is approx 25 bucks a quart !!! I do agree the Ford Racing friction modifier is really good stuff !! When I was working that’s all I kept in stock was the Ford Racing . Ford came out with a TSB years ago saying if you have a chattering problem in the rear end to use the Ford Racing Friction Modifier !!
         
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        • dibbons

          dibbons FABO Gold Member FABO Gold Member

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          My rear end guy, er, differential guy added the Ford stuff that he prefers for some reason.
           
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          • 1969383S

            1969383S FABO Gold Member FABO Gold Member

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            With a cone type, I use the Valvoline pre mix. If clutch type Dana I would add the additive+ the Valvoline limited slip juice.
             
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            • Syleng1

              Syleng1 Karma is real and Life is short... FABO Gold Member

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              Mopar additive-
              Is what I use. 4oz bottle from dealer is like $8.00. If you still get chattering after driving around and the rear gets up to temp- I add another bottle. Cone type rears like the one in my 741 case seem to need 2 bottles. I just use a good brand 80w90 gear oil. Napa or Castrol. If I don’t recognize the name I won’t use it. Never tried the oil that has it in the bottle already.
               
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              • QuickDart360

                QuickDart360 Well-Known Member

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                I always use K&W limited slip additive. Comes in a tube.
                 
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                • S'cuder

                  S'cuder FABO Gold Member FABO Gold Member

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                  Pennzoil 4096, Gearplus 80W-90, now sold as Pennzoil Gear and Axle. Used and sold it since 1985. Limited slip additive already included in the formula. Never had a customer complaint about chattering, although probably more than half would have been used in open diffs. Wholesale price was pretty cheap, but retail markups can be very high. Yeah, $6.25/qt by the case of 12 on Amazon. $15.52 for a single quart.
                   
                • Alaskan_TA

                  Alaskan_TA Well-Known Member

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                  Lucas also has a gear lube safe for sure-grips, I get mine at the local NAPA.

                  I found a full NOS bottle at a local antique mall, but I can not bring myself to use it.......

                  nos sure grip lube.JPG
                   
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                  • yellow rose

                    yellow rose Overnight Sensation FABO Gold Member

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                    Yep, that’s too cool to use. It looks good just sitting there.
                     
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