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    #16
    just realized I posted this in the wron thread... Anyways, Carry On

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      #17
      Originally posted by 1980c10 View Post
      yes are cars use 28 spline axles. With 3.73 gears you will only be turning 1900rpm at 100kph, which is damn fine imo. With 3.55's you will turn 1800rpm at 1000 kph. I think I would turn the 100rpm extra and go with the 3.73's and get a little better acceleration.
      You will notice a difference in acceleration between 3.55's and 3.73's, But you will not notice a difference in milage between the two.

      So I say 3.73's
      funny you should say that, I have the chance to buy either. 3.55 for 80 bucks or 3.73 for 150 bucks.
      sigpic


      - 1990 Ford LTD Crown Victoria P72 - the street boat - 5.0 liter EFI - Ported HO intake/TB, 90 TC shroud/overflow, Aero airbox/zip tube, Cobra camshaft, 19lb injectors, dual exhaust w/ Magnaflows, Cat/Smog & AC delete, 3G alternator, MOOG chassis parts & KYB cop shocks, 215/70r/15s on 95-97 Merc rims

      - 2007 Ford Escape XLT - soccer mom lifted station wagon - 3.0 Duratec, auto, rear converter delete w/ Magnaflow dual exhaust

      - 2008 Mercury Grand Marquis Ultimate Edition - Daily driver - 4.6 2 valve Mod motor, 4R75E, 2.73s. Bone stock

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        #18
        I would spend the extra and do 3.73's. You won't regret it.


        '90 LX 5.0 mustang
        Big plans

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