Mach 1 How to identifiy 4R70W vs 4R75W

Discussion in 'Special Production' started by serialkeller, May 22, 2009.


  1. serialkeller

    serialkeller New Member

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    I have a transmission from an '04 mach1 and i need to know if I have either a 4R70W or a 4R75W. Does anyone know how to tell the difference from the outside? I dont have the vin or door code from the car it was pulled from, but I know it's a mach because i seperated it from the engine ;)

    Some more info:
    tail: RF-3L3P-7006-AA
    case: RF-F3LP-7A040-AA

    Thanks!
  2. Crzyhrse

    Crzyhrse Active Member

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    I did a search over at Mach1Registry and the only thing I could come up with is the '03 had the 4R70W and the '04 had the 4R75W. If you can find the build sheet which may or may not be hidden somewhere in the car maybe that has the exact info. and codes. :shrug:
  3. DBMSTNG

    DBMSTNG I fantasize about it being BIG! Founding Member

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    according to Wikipedia, all 2003+ V8 Mustangs have the 75.
  4. serialkeller

    serialkeller New Member

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    Thanks guys, I appreciate the info. It would be nice if there was some casting number indication, since i dont have too much info from the original car :mad:
  5. sgarrelts01

    sgarrelts01 New Member

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    All the 04 automatic Mach 1s i have seen come with a 4R75W

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