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planning on getting 4.10 gears in my 2003 grand marquis

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    planning on getting 4.10 gears in my 2003 grand marquis

    curious if id be wasting money to do the ford racing 8.8 master rebuild kit first? anyone know?

    #2
    Master rebuild kit when the gears go in, makes total sense to replace all bearings and seals when you have it apart anyway so you don't have to go in again for awhile.


    Sent while running from the cops using Tapatalk
    1989 Country Squire - Twilight Blue, 347 stroker


    2005 Crown Victoria Sport - Black - Stainless Works full exhaust with Borla Pro XS mufflers, BBK 75mm TB, Accufab plenum, CVPI airbox, Heinous control arms, etc...

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      #3
      Only if you don't have a Trak-lok differential.

      -ryan s.
      08 Lincoln Navigator L - 233k
      03 Mercury Marauder- 63k
      97 Ford Crown Victoria HPP "Tank of Justice III" (TOJ3) - 194k -->578.9 miles on ONE tank of gas<--
      94 BMW 325i Convertible - 135k
      73 VW Super Beetle "Bunky" <----- Wifey's
      12 Mini Cooper S - 90k <---- Wifey's
      Originally posted by pantera77
      Well my buddy tells him he knows exactly who loves buying shitboxes.

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        #4
        Besides Bearings, races and seals, what is in the kit?

        Why only if no posi?
        03 Marauder DPB, HS, 6disk, Organizer Mods> LED's in & Out, M&Z rear control arms, Oil deflector, U-Haul Trans Pan, Blue Fuzzy Dice
        02 SL500 Silver Arrow
        08 TC Signature Limited, HID's Mods>235/55-17 Z rated BFG G-Force Comp-2 A/S Plus, Addco 1" rear Sway, Posi Carrier, Compustar Remote Start, floor liners, trunk organizer, Two part Sun Visors, B&M Trans drain Plug, Winter=05 Mustang GT rims, Nokian Hakkapeliitta R-2 235/55-17
        12 Escape Limited V6 AWD, 225/65R17 Vredestein Quatrac Pro, Winter 235/70-16 Conti Viking Contact7 Mods>Beamtech LED headlight bulbs, Husky floor liners

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          #5
          Putting 4.10s in a open diff seems a bit wrong.

          -ryan s.
          08 Lincoln Navigator L - 233k
          03 Mercury Marauder- 63k
          97 Ford Crown Victoria HPP "Tank of Justice III" (TOJ3) - 194k -->578.9 miles on ONE tank of gas<--
          94 BMW 325i Convertible - 135k
          73 VW Super Beetle "Bunky" <----- Wifey's
          12 Mini Cooper S - 90k <---- Wifey's
          Originally posted by pantera77
          Well my buddy tells him he knows exactly who loves buying shitboxes.

          Comment


            #6
            Originally posted by SVT98t View Post
            Putting 4.10s in a open diff seems a bit wrong.

            -ryan s.
            Great recipe for wheel spin

            85 4 door 351 Civi Crown Victoria - Summer daily driver, sleeper in the making, and wildly inappropriate autocross machine
            160KMs 600cfm holley, shorty headers, 2.5" catted exhaust, 255/295 tires, cop shocks, cop swaybars, underdrive pulley, 2.73L gears.
            waiting for install: 3.27's, Poly bushings, boxed rear arms, 2500 stall converter, ported e7's, etc

            06 Mazda 3 hatch 2.3L 5AT (winter beater that cost more than my summer car)

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              #7
              Yes from the "what is the point" sense.

              Yes do everything at the same time, bearings, seals, gears, posi carrier, (if it is not already posi) and axles on inspection.

              If the car has posi you probably want new clutches in there.

              It may be a good idea to open the rear, pull the axles and inspect them in advance of any new parts install project. This way you can have good axles on hand if they are needed. Unless you can lay up the car for several days when you are doing the rear. 2003 came with soft axles when new, so they may already be replaced by now if not, they probably are shot.
              03 Marauder DPB, HS, 6disk, Organizer Mods> LED's in & Out, M&Z rear control arms, Oil deflector, U-Haul Trans Pan, Blue Fuzzy Dice
              02 SL500 Silver Arrow
              08 TC Signature Limited, HID's Mods>235/55-17 Z rated BFG G-Force Comp-2 A/S Plus, Addco 1" rear Sway, Posi Carrier, Compustar Remote Start, floor liners, trunk organizer, Two part Sun Visors, B&M Trans drain Plug, Winter=05 Mustang GT rims, Nokian Hakkapeliitta R-2 235/55-17
              12 Escape Limited V6 AWD, 225/65R17 Vredestein Quatrac Pro, Winter 235/70-16 Conti Viking Contact7 Mods>Beamtech LED headlight bulbs, Husky floor liners

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                #8
                im sure they havent been replaced because i got it from an old lady and theres 26,000 miles on it. what would be my options or the better route?

                Comment


                  #9
                  Convert to 31 spline axles, get a 31 spline posi.
                  03 Marauder DPB, HS, 6disk, Organizer Mods> LED's in & Out, M&Z rear control arms, Oil deflector, U-Haul Trans Pan, Blue Fuzzy Dice
                  02 SL500 Silver Arrow
                  08 TC Signature Limited, HID's Mods>235/55-17 Z rated BFG G-Force Comp-2 A/S Plus, Addco 1" rear Sway, Posi Carrier, Compustar Remote Start, floor liners, trunk organizer, Two part Sun Visors, B&M Trans drain Plug, Winter=05 Mustang GT rims, Nokian Hakkapeliitta R-2 235/55-17
                  12 Escape Limited V6 AWD, 225/65R17 Vredestein Quatrac Pro, Winter 235/70-16 Conti Viking Contact7 Mods>Beamtech LED headlight bulbs, Husky floor liners

                  Comment


                    #10
                    what exactly would that do

                    Comment


                      #11
                      28 spline are phased out in 05 or 06? 31 is much more readily available. You can get a new 31 spline Ford carrier, not possible for 28 spline unless you find NOS. You certainly get a used 28 spline unit and new 28 spline axles. Either way for axles I say get USA made (not Dorman) if you can. Of course you can get used axles also.
                      03 Marauder DPB, HS, 6disk, Organizer Mods> LED's in & Out, M&Z rear control arms, Oil deflector, U-Haul Trans Pan, Blue Fuzzy Dice
                      02 SL500 Silver Arrow
                      08 TC Signature Limited, HID's Mods>235/55-17 Z rated BFG G-Force Comp-2 A/S Plus, Addco 1" rear Sway, Posi Carrier, Compustar Remote Start, floor liners, trunk organizer, Two part Sun Visors, B&M Trans drain Plug, Winter=05 Mustang GT rims, Nokian Hakkapeliitta R-2 235/55-17
                      12 Escape Limited V6 AWD, 225/65R17 Vredestein Quatrac Pro, Winter 235/70-16 Conti Viking Contact7 Mods>Beamtech LED headlight bulbs, Husky floor liners

                      Comment


                        #12
                        Get a posi and go with 3.73's. I did the 4.11 route, specifically for spinning my tires. It's pretty bad on the highway and will cut your fuel mileage in half. 3.73's are about as low as I'd personally go on a DD
                        79 Grand Marquis

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