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Thread: E46 Automatic Transmission woes

  1. #1
    Join Date
    Apr 2017
    Location
    Baldwin Park, Ca
    Posts
    1
    My Cars
    '93 BMW 325is & '99 328i

    E46 Automatic Transmission woes

    Since I bought "Herman" a 2003 330ci w/automatic trans, I've had Transmission Problems, I've had him repaired several times by competent Technician. Transmission was rebuilt but twice the main seal has blown and replaced under warranty; This problem keeps reoccurring. Also living in LA I'm often stuck in heavy freeway traffic and transmission (GEAR COG) light comes on and the next morning when I start the car, no light back to normal.

    I suspect the problem lies with the transmission oil cooling system, but I haven't found much info on diagnosing the Trans oil cooling system or what would some of the symptoms be when that system fails.

    Can someone please comment or share info on transmission oil cooling system on automatic E46 w/M54 engine?

    Thank you advance...

  2. #2
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,934
    My Cars
    2018 BMW M240i
    The transmission fluid cooler is at the expansion tank on the driver’s side of the radiator.

    http://www.realoem.com/bmw/enUS/show...diagId=17_0146

    Modern transmissions require specific fluid levels. The transmission in your car is no exception. Your transmission, made by the Germany company ZF, requires a specific fluid and a specific fluid fill procedure. I suggest you find a reputable shop that specializes in bimmers. Try www.bimrs.org.

  3. #3
    Join Date
    Apr 2018
    Location
    Reno,nv
    Posts
    2
    My Cars
    01 325i
    Will any other auto transmission fit in my 2001 325i? I have the G.m. type in it now but blown up....I was told the 01-03 z3 transmission with fit with no mods added....is this true?

  4. #4
    Join Date
    Jul 2011
    Location
    Arlington, VA
    Posts
    9,934
    My Cars
    2018 BMW M240i
    The”new” transmission needs to be another GM, and not a ZF unit. I don’t know which transmission case in the Z3, but if it’s a GM it should fit without issue.

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