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Thread: 1992 750IL transmission stuck in 3rd not shifting

  1. #1
    Join Date
    May 2018
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    New Zealand, Christchurch
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    1992 750IL E32 my car :)

    1992 750IL transmission stuck in 3rd not shifting

    Hi all!
    I am having some difficulties with my 750il which is a restoration project for me.
    I have only got the engine running since I got it and never had the trans running properly and don't know anything about it previously. (fresh fluid flush)
    Currently I am stuck with the issue of the vehicle not changing gears in D only staying in the 3rd ( or maybe 4th? gear)
    Reverse is fine along with park and neutral.
    I have found under the vehicle that the plug to the valve bodys has been cut and attempted to be wired up to a 8 pin valve body, when from my research all of the 1992 models are 7 pins. I also got with the vehicle another valve body which is a 7 pin.
    My question is.. Could this 8 pin valve body work on a 1992 750il or am I best to overhaul the 7 pin body and install that into the vehicle?
    very confused as to why someone has installed an 8 pin valve body on this vehicle

  2. #2
    Join Date
    Jan 2005
    Location
    Japan
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    11/88 E32 750iL+98 E36M3
    Welcome here. Is the car originally a import from Japan? I noticed in NZ you have a lot of imports of used Japan spec. cars. What is the VIN?
    On a 1992 750 the valve body is definitely a 7-pin unit. Easiest might be to install the 7-pin valve body again after overhauling it, not too difficult, info is on my website below. This is very important, download it, 11.5 MB , link with test data for all the valves and the resistance in ohms , different valve bodies etc http://parts-at.ru/wp-content/upload...Tech-Guide.pdf
    The differences are in the valve bodies and the transmission control units during production years. Would also be good if you could post all the details shown on the transmission control unit which is located right side / passenger side behind the speaker in the footwell and very important the details on the name tag on the transmission side, there is a ZF name tag with serial number, type, and a part number. Experts like whiskychaser can get a lot of info from such details. The part number shows us which valve body was originally installed.

    EDIT:
    I tought a bit more about your problem. It could be that the problem is NOT the transmission, but that the car runs in limpmode = 3rd gear.
    Are you sure the engine runs on 12 cylinders?
    When you switch the ignition on, the EML light in the cluster must go on for about 2 seconds and then go off and not come back. If that is not the case = EML light never comes on or always stays on, your engine/system runs in limpmode = 3rd gear.

    Test both fuel pumps, I do it usually like this: remove the fuse box cover in engine bay, check with your fingers the pressure in the fuel hoses left side engine bay below the radiator expansion tank, remember the pressure.
    Then use a short cable and hold it for 2-3 seconds on B+ pole and the other end on top of fuse 23, then on fuse 24 (double check in wiring diagrams), then you should hear the fuel pumps running with engine off and ignition off. Then check again both fuel hoses, pressure must have changed, as there should be at least 3 bar now in the fuel hoses.

    This is the start of the testing, report back and we will inform you the next steps.
    Read this https://www.bimmerforums.com/forum/s...Ultimate-Guide
    Last edited by shogun; 05-14-2018 at 08:37 AM.
    Shogun tricks and tips for the E32 series are HERE!

  3. #3
    Join Date
    Sep 2006
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    NW suburban Chicago
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    hiss by my window
    Just a thought regarding limp mode. A weak battery can also cause the car to run in limp mode. I've personally had that happen. Battery was run down from sitting and car wouldn't run right, had EML light etc. Recharged the battery, car would start fine but still not run right. Fresh battery and all was well again.

    If you can leave two black stripes from the exit of one corner to the braking zone of the next, you have enough horsepower. - Mark Donohue

  4. #4
    Join Date
    Jul 2007
    Location
    Oldham UK
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    '00 330i Sprt '92 525i
    Maybe clarify something? If the trans is in limp mode, you don't usually see the 'D' in the cluster (or the E for economy etc). What you see is a message saying 'transmission program' or words to that effect. Is that what you have - or does it just refuse to shift gears?
    Last edited by whiskychaser; 05-14-2018 at 03:23 PM.

  5. #5
    Join Date
    May 2018
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    New Zealand, Christchurch
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    1992 750IL E32 my car :)
    Shogun, Yes the car is a japanese import (like most our vehicles)
    I have some details regarding the trans ecu so we can try identify what sort of valve bodys should be installed.
    0 260 002 259
    1 219 858 HC
    GC77000238
    The Vin number is WBAGC82020DC71541

    The EML operates correctly and engine seems to be running fine, no codes on either banks when i scan it either.

    Ross, I have a very healthy battery thanks just checked with a brandnew one also to no change.

    Hi Whiskeychaser, I manage to see the D on the cluster and it will even go through 3,2,1 but the E will dissapear shortly after starting the car, I do have the trans program error come up and when I scan the drivetrain I get an error 22 'Pressure regulator'.

    Update I have tried the vehicle with the plug going to the valve body unplugged to no change so am thinking it is something to do with the valve body, using the information about the trans ecu could you give me any information on what sort of valve body would work or weather i can make this 8 pin one work?

  6. #6
    Join Date
    Jan 2005
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    Japan
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    11/88 E32 750iL+98 E36M3
    original based on VIN:
    production date 03/1992 is automatic transmission EH 4HP24-KU 24001219743
    valve body is this http://www.realoem.com/bmw/enUS/show...diagId=24_1225

    08 Cable harness from 12/1988 24637508670 ......and a pic .... https://www.ecstuning.com/b-genuine-...s/24637508670/
    https://www.bimmerforums.com/forum/s...Wiring-Harness

    let's see what whiskychaser is saying when Europe weaks up again.

    Maybe you meanwhile can check the ZF name tag on the trans, the part number is very important
    Last edited by shogun; 05-14-2018 at 07:27 PM.
    Shogun tricks and tips for the E32 series are HERE!

  7. #7
    Join Date
    May 2018
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    1992 750IL E32 my car :)
    The transmission name tag says that it is a 4HP-24 1043 030 021 and there is a serial number punched into it, 0067844
    Above the tag there is 4HP-22 on the housing

  8. #8
    Join Date
    Jan 2005
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    Japan
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    11/88 E32 750iL+98 E36M3
    Page 374 http://avtgr.ru/data/pdf/Technical_data_2015-07-31.pdf
    AT: 2400 - 1216699, 07 / 87 - 05 / 90, 1043 030 021
    AT: 2400 - 1216908, 03 / 89 - 01 / 94, 1043 030 026
    in total 11 different part numbers for valve bodies for the E32 750iL listed there
    strange that 1043 030 021 used 07/1987 - 05/1990 is installed in a 03/1992 750. But in those old days there was plenty of stock, no just in time.
    A BMW parts guy could check in their records with the VIN also the original serial number of the installed transmission. Maybe you have such connections there? 10 years ago I had a contact in BMW in Ger and he once gave me the trans number for my 750iL built 11/88 and that was Getriebe-Nummer : 0018725ZBU

    4HP22 in the housing does not matter, all 4hp22/24 have them, that is just the housing.

    valve body harness 1043 227 016 can be used for part no. 1043 030 012/019/021/026/058 http://www.zftranspart.com/index.php...d=40&parent=46

    Let's see what the others comment. We have to investigate further
    Shogun tricks and tips for the E32 series are HERE!

  9. #9
    Join Date
    Jul 2007
    Location
    Oldham UK
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    '00 330i Sprt '92 525i
    As Shogun says, the BMW part number for the ZF 1043 030 021 is 1216699. Using your VIN number, Realoem says it should be 1219743. But it doesn't matter because it also says they are compatible. The serial number is just like an engine number - nice to know but not really helpful.

    The 8 pin socket will have been used because older transmissions had another solenoid to lock out reverse. Yours does not have that. Other than that, the TCM pin numbers, wiring colours and shift matrix are the same. BUT you can't just put any old valve body in there and expect it to work. (Your trans was superceded by 1218174 and 1219743 and they would not work ) The other complication is that the TCM you list was not produced until 3 months after your car was built. So presumably it has been swapped at some stage.

    Without a proper harness and the correct valve body, I think you are going to struggle

  10. #10
    Join Date
    Sep 2018
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    Mid Michigan`
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    1991 750il,
    this thread is helpful to me I just picked up a 91 750il with a weak battery and no 4th gear and reverse was very weak.

  11. #11
    Join Date
    Jan 2005
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    Japan
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    11/88 E32 750iL+98 E36M3
    First recharge or replace the battery, test the engine. Then recheck the transmission fluid level, the 4HP24 has a dipstick, easy to check, maybe just a low fluid level, procedure here https://www.europeantransmissions.co...MWtechinfo.htm
    Shogun tricks and tips for the E32 series are HERE!

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