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Thread: A4S 310R Auto Transmission - No Reverse -

  1. #1
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    Default A4S 310R Auto Transmission - No Reverse -

    BMW A4S 310R = GM 4L30E
    A cure for no reverse

    If your car has suddenly lost it's reverse, it could be your Tcc soleniod, when this solenoid goes out your locked out of reverse. A replacement may be purchased at, Transmissionpartsusa under its GM name 4L30E, BMW calls it module A4S 310R this may work for other transmissions too. The part is called a Torque converter lockup solenoid for 1990-1999, Part number 81396A. there is another for 2000-on. you'll see it listed when you go online. the BMW number is 24331218916. I hope this saves some of you the cost of a transmission replacement. The other reason they go out is the clip scears off in the reverse drum and cracks it.
    Transmission parts USA Automatic transmission parts

  2. #2
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    details to measure, Ohm etc on the valves
    http://www.kneb.net/bmw/E46/Auto%20t...ion%20info.pdf

    if that link does not work, use this one with the wayback machine https://web.archive.org/web/20131008...ion%20info.pdf
    Last edited by shogun; 08-27-2017 at 08:36 AM.

  3. #3
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    Revised ATF service (drain and fill capacity) for the A4S 310R and the A5S 310Z
    https://wiki.bentleypublishers.com/d...+transmissions

  4. #4
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    Great information. Thanks!
    Thanks,

    1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment

  5. #5
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    GENERAL MOTORS® Hydra-Matic 4L30-E automatic transmission Assembly manual by Hans Verhoeven http://scottj.info/files/isuzu/4l30e.pdf

  6. #6
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    Quote Originally Posted by shogun View Post
    GENERAL MOTORS® Hydra-Matic 4L30-E automatic transmission Assembly manual by Hans Verhoeven http://scottj.info/files/isuzu/4l30e.pdf
    Wow. It's been a while. In 2012 replaced my failed trany with a remanufactured one from a specialist in CA, I live in KY. In my installed by an independent BMW shop. Been only 24,000 miles. However, i did change the fluid this year. 240,000 on the 95 525i and still going strong.
    Thanks,

    1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment

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