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Thread: 1991 E34 M20 - 4HP22 won't work after some changes

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  1. #1
    Join Date
    Sep 2011
    Posts
    12

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    First, this wiring loom socket has 8 pins but it has seven wires in it which are rearranged for 7 pin transmission. So, the connector is OK and it matches the wire colors, everything's properly done according to the wiring diagram. Unfortunately, there's no M20 with the ASC and this M20 is '89. I have no donor car and I have bought this transmission because the previous one had a mechanical failure. I just want to know if there's a point in connecting these 4 wires with the ABS which was previously connected, but I'm pretty sure that it won't work on this engine?

  2. #2
    Join Date
    Feb 2006
    Location
    Oldham, England
    Posts
    3,078

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    Your original post says it is a '91, you have posted elsewhere it is a '93 and now you are saying it is an '89? It sounds like Johnny Cash's '56 Chevrolet
    If your M20 and 4hp22 are out of an '89 you need the TCM and loom out of an '89 to stop you getting transprog and going into limp mode. AFIK your ABS will still work though you may well get the ASC light on. Maybe do a search on ASC delete
    Oct '00 E46 330i. Feb '92 525i (departed)

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