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Thread: Manual to Auto swap

  1. #1
    Join Date
    Sep 2018
    Location
    Canada
    Posts
    2
    My Cars
    97 318is Manual, 98 328i

    Manual to Auto swap

    I need some information regarding this before I make an attempt and fail at it, my buddies e36 comes with a Manual transmission but he wants to do an automatic swap, the deal is I get to take the manual tranny... but I’m unsure about the wiring, will the Manual engine harness work with an Automatic transmission? If not will I be able to use a harness that came from another OBD2 engine of the same model? Any information helps thanks!


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  2. #2
    Join Date
    Apr 2015
    Location
    Tennessee
    Posts
    1,736
    My Cars
    1998 BMW 328i
    You will need to swap wiring harness, part of the driveshaft, and also source a computer for the auto trans

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  3. #3
    Join Date
    Sep 2018
    Location
    Canada
    Posts
    2
    My Cars
    97 318is Manual, 98 328i
    Do you know if there is a specific automatic transmission ecu I’m supposed to use? Thx!

  4. #4
    Join Date
    Nov 2012
    Location
    Little Rock, Ar, USA
    Posts
    93
    My Cars
    '98 M3 '79 635csi '74cs
    Hi
    I have some parts that may be interesting for this project:
    driveshaft
    gearbox ECU
    final drive
    I think harness
    Let me know if you want more details
    Quote Originally Posted by devinfyeah1 View Post
    I need some information regarding this before I make an attempt and fail at it, my buddies e36 comes with a Manual transmission but he wants to do an automatic swap, the deal is I get to take the manual tranny... but I’m unsure about the wiring, will the Manual engine harness work with an Automatic transmission? If not will I be able to use a harness that came from another OBD2 engine of the same model? Any information helps thanks!


    Sent from my iPhone using Tapatalk

  5. #5
    Join Date
    Jun 2010
    Location
    NY
    Posts
    9,098
    My Cars
    1997 328i
    I don't know how big of deal it is, but the main DME also has slightly different software for the automatic. You can flash the DME with an automatic trans version. You would need some $25 software and a cable that doesn't cost to much and a ROM file.

    https://sites.google.com/site/openms...s41-flash-tool

    - - - Updated - - -

    Also, when you have the automatic (hopefully its good), it is wise the have the torque converter rebuild, it's about $125 (rockauto.com), replace the o-ring on the input shaft and replace the input shaft seal.
    Attn. NEWBIES: Use the search feature, 98% has already been discussed.
    Click the search button, select "search single content type", select the "e36 sub forum" specifically, try the "search titles" then try the "search entire posts".

  6. #6
    Join Date
    Jun 2011
    Location
    SanDiego,Dallas,Miami,Orl
    Posts
    376
    My Cars
    Too Many
    Reverse of this:
    http://e36-tech.com/DIY/5speedswap.htm

    Use the auto trans computer thats with the auto harness (im assuming youre getting used parts from a salvage yard?)

    Since you say the car is obd2, once you change from 5-sp harness to auto, you may have a problem with EWS but im not 100% sure about it (my EWS is deleted by switching to obd1). Let us know how it goes...you only have 2 posts asking questions with no contribution to this forums so im not sure how many ppl are willing to respond. The search button is your friend. Good luck

    Rich
    Current lineup: 99 BMW M3vert (project) , 05 Mazda RX-8, 04 Mercedes CLK320, 03 Chevy Express 1500 (work van).
    Previous rides: 07 Mazda RX-8, 92 BMW 325iNV, 94 BMW 325iC, 94 BMW 325i S50 M3 clone, 84 Mitsubishi Cordia Turbo, 84 Mazda B2000 lowrider, 88 Toyota Tercel, 88 Honda Accord, 93 BMW 318i, 95 Nissan Altima, 89 Toyota Camry, 95 Mitsubishi Eclipse GS-T, 93 BMW 318is, 84 Toyota Tercel, 96 Mitsubishi Eclipse GS-T, 97 BMW 528i 1JZ swap, 94 Acura Integra 4dr, 88 Toyota Corolla Wagon, 97 VW Jetta GLS, 86 Toyota Corolla AE86 4A-GZE supercharged engine swap, 94 Lexus LS400, 95 Isuzu NPR Turbo, 01 Suzuki TL1000R, 98 Honda CBR600F3, 99 Yamaha R6 and countless other dirt bikes and toys

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