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Thread: Transmission problem?!

  1. #1
    Join Date
    Apr 2017
    Location
    Atlanta, Ga
    Posts
    1
    My Cars
    1992 BMW 735il

    Transmission problem?!

    I have a 1992 735il and I believe my transmission is giving way. It started shifting odd once I replaced my shifter cable and now, RPM will rise but car would still have no power. I checked the fluids, they're good. What's next? Is it my transmission or possibly an electrical problem

  2. #2
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    54,613
    My Cars
    11/88 E32 750iL+98 E36M3
    Did you check the fluid level the proper way with engine running and AC on? Here is the detailed procedure http://www.europeantransmissions.com...MWtechinfo.htm
    What means fluids are good? Level, color, smell?
    Changed already the transmission filter? Cleaned the valve body? There is a filter inside the valve body, that can be blocked https://www.bimmerforums.com/forum/s...hifting-solved
    Do you see the selected gear and mode in the check control in the cluster? If not, clean the shift selector contacts http://www.nmia.com/~dgnrg/page_13.htm
    does it work when you select R, D, 3-2-1 or all all selected gears not working, that would be strange.
    Do you see in the cluster the selected gear = same what is shown in the shift indicator under the gear handle?
    Did you install the shifter cable correct?
    https://www.bmwtechinfo.com/repair/m...es/4810390.jpg
    https://www.bmwtechinfo.com/repair/m...es/4810391.jpg
    https://www.bmwtechinfo.com/repair/m...es/4810392.jpg
    Shogun tricks and tips for the E32 series are HERE!

  3. #3
    Join Date
    Apr 2019
    Location
    San Diego
    Posts
    1
    My Cars
    1988 735il
    Have a 1988 735il. Trans won't go into 4th gear. Any thoughts or suggestions?

  4. #4
    Join Date
    Jan 2005
    Location
    Japan
    Posts
    54,613
    My Cars
    11/88 E32 750iL+98 E36M3
    please answer the questions in my post # 2.
    4HP22 repair manual says: gear change functions in cold or warm state faulty:
    change 1-2/2-1 = governor dirty
    change 1-2 = brake C' and/or C faulty
    change 2-3/3-2 = governor dirty, shift valve 2-3 sticking
    change 2-3 = clutch B faulty
    change 3-4/4-3 = governor dirty, shift valve 3-4 sticking
    change 3-4 = brake F defective

    I would check first all these things and clean the valve body.
    Shogun tricks and tips for the E32 series are HERE!

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