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convert 3sp auto to 4sp auto

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  • #1

    convert 3sp auto to 4sp auto

    hey guys just wondering wat auto if any i can use to replace my 3sp auto with, ive read up about the conversion but everyseems to be using the electronic controlled auto, was there ever a 4sp auto that has the vacuum operated kickdown? if not wat other auto can i use. ps 3800rpm at 100km/h is way to high. lol
    Tags: None
  • #2
    Hatchback is your man!!! I'm sure he will pop up here soon.
    1992 white L, Bp, American racing 13's, stock trans.
    1991 White L, BP/F5MR, protege header, full aspire swap with gr2's, seats, and sway bar, 15" konig's, short throw, escort console.
    1991 blue L, 5 speed.
    1988 red L-plus-all stock.

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    • #3
      The auto's in the 88-89 323's were a 4 speed auto and htchbck has one of those tranny's

      From what he says they are hydraulically controlled with a cable going from the trans to the throttle body for the kickdown

      I will soon be doing a B6T swap using a 4 speed auto, full pics and write up will follow

      1988 323 Station Wagon - KLG4 swapped
      1988 323 GT - B6T Powered
      2008 Ford Escape - Rollover Survivor

      1990 Festiva - First Ever Completed KLZE swap (SOLD)

      If no one from the future stops you from doing it, how bad of a decision can it really be?

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      • #4
        Is 3800 RPM at 62 MPH normal? I just got tags for my first auto Festy.

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        • #5
          ^^yup sounds about right lol unfortunately lol

          1988 323 Station Wagon - KLG4 swapped
          1988 323 GT - B6T Powered
          2008 Ford Escape - Rollover Survivor

          1990 Festiva - First Ever Completed KLZE swap (SOLD)

          If no one from the future stops you from doing it, how bad of a decision can it really be?

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          • #6
            @ 34mpg
            Never Hire a Boy to do a Man's Job!!

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            • #7
              Originally posted by georgeb View Post
              Is 3800 RPM at 62 MPH normal? I just got tags for my first auto Festy.
              oh GOD no, i'll pull 3100rpm at 65mph in Pepe (90L auto) and 76 mph in a 5 speed festy at the same RPM.

              now if you have an aspire auto, you'll pull about 3900rpm at 70 mph (depending on year).
              Trees aren't kind to me...

              currently: 2 88Ls (Scrappy and Jersey), 88LX, 90L(Pepe), 91L, 91GL (Skippy) 93 GL Sport (the Mighty Favakk), 94 (Bruce) & 95 Aspire SEs, 97 Aspire (The Joker),
              94 Justy 4WD, 87 Fiero GT, plus 2 parts cars. That's my fleet.

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              • #8
                yer its bs ay, thats how i stuffed my old 1.3L by doin highway drives to much. u say 88-89 323's have a 4sp auto? but u said it has a kickdown cable. im using a carby setup and i dont have the piece where the cable attaches thats why i was wondering if the was a 4sp auto with the vacuum modulator kickdown.

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                • #9
                  When you post what RPMs you are doing at whatever speed, you also need to specify Aspire or Festiva ATX and your tire size. Aspires have a lower final drive (higher numerically).

                  There'll be a difference between 145/80-12 (or 165/70-12) and 175/70-13. The larger tires will lower your RPMs.

                  Karl
                  '93GL "Prettystiva" ticking B3 and 5 speed, backup DD; full swaps in spring!
                  '91L "AquaMutt" my '91L; B6 swap/5 speed & Aspire brakes, DD/work car
                  '92L "Twinstiva" 5sp, salvage titled, waiting for repairs...
                  '93GL "Luxstiva," '94 B6 engine & ATX; needs overhauled
                  '89L "Muttstiva," now a storage bin, future trailer project

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                  • #10
                    Originally posted by Damkid View Post

                    I will soon be doing a B6T swap using a 4 speed auto, full pics and write up will follow
                    cant wait for this... are the 4 speed autos capable of holding power?
                    I know its a piece of crap but im still faster...and its 100% legal!!!!!

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                    • #11
                      The electronic ones die behind 100HP b6d's...hopefully the hydro ones are a but more resilient.
                      91GL BP/F3A with boost
                      13.79 @ 100, 2.2 60' on 8 psi and 155R12's

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                      • #12
                        die or break? Dying can be addressed.
                        1993 GL 5 speed

                        It's a MazdaFordnKia thing, and you will understand!

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                        • #13
                          Originally posted by getnpsi View Post
                          die or break? Dying can be addressed.
                          All in the choice of words lol... Rocketman says "grenade". I think he mentioned diffs and side gears in one post?

                          As for the original question, here in the states we had 4 speed autos available in the '88-'89 323 hatchbacks and sedans. Don't know if you had the same in Aus though.

                          And Damkid is correct, they are hydro controlled via a throttle cable, so not actually vac controlled but still the same basic principal. Not computer controlled at least
                          Last edited by htchbck; 01-23-2012, 02:31 PM.
                          No festiva for me ATM...

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                          • #14
                            Originally posted by Safety Guy View Post
                            When you post what RPMs you are doing at whatever speed, you also need to specify Aspire or Festiva ATX and your tire size. Aspires have a lower final drive (higher numerically).

                            There'll be a difference between 145/80-12 (or 165/70-12) and 175/70-13. The larger tires will lower your RPMs.

                            Karl
                            over here in australia, our tyre placard has a standard tyre size of 165/65R13 on the WA festiva 4 door

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