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Thread: M30 Auto Trans '92 into '89... Works?

  1. #1
    Join Date
    Mar 2004
    Location
    Toronto, Canada
    Posts
    183

    Default M30 Auto Trans '92 into '89... Works?

    Hi there,

    I have a friend needing a transmission swap. He has an 89 M30 E34.

    According to realoem the 1989 BMW E34 535 auto came with two different tranny's depending on when manufactured. The transmission changed again in late 90 to a newer style again.

    I'm not sure of the build date of his 89 (not near car) so the one in the car now is either:

    4HP22-EF (early 89)
    4HP22-GE (late 89 up to 9/90)

    The one I can get is from a 1992 and is a 4HP22-HR (9/90 - thru end of production)

    Is the 92 swappable into the 89? I've heard that there are electrical plug differences but not sure if they can be overcome through a pigtail swap of some sort?

    Rod
    01 740i sport
    92 535i
    92 525 touring
    88 325ic

  2. #2
    Join Date
    Apr 2006
    Location
    Chicago, Il. U.S.A.
    Posts
    4,243

    Default

    Sorry, can't help other than a bump.
    "The gas pedal wouldn't go to the floor if it weren't meant to be there"

  3. #3
    Join Date
    Dec 2003
    Location
    baton rouge, loserana
    Posts
    6,922

    Default

    they run a different computer and harness from the early to late, the way i split the difference is the early car has a 3 position selector switch with E S M and the late car has a 2 position with A M i guess you could swap the tranny the harness and computer, externally they are the same tranny
    all america wants is cold beer warm cat and a place to take a poop with a door on it

  4. #4
    Join Date
    Mar 2004
    Location
    Toronto, Canada
    Posts
    183

    Default

    Ok thanks... so a direct bolt in and can be made to work electrically with extra harness and computer from donor car.

    R
    01 740i sport
    92 535i
    92 525 touring
    88 325ic

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