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Found 1 result

  1. Toughguyhuh

    E39 5HP19 transmission faults

    I'm after a bit of advice regarding troubleshooting the limp mode issue in my E39 with 99k miles. I bought it cheap as a project car, knowing there was a fault and since it's not my daily driver I'm not under any pressure to sink a lot of cash into getting it back on the road. The codes it's giving are: 31 - EGS Sympton, gear monitoring 36 - EGS Gear monitoring 4 (P0734) I have already dropped the sump and given it a new filter, gasket and oil. The oil that came out looked nice and clean and the magnets didn't have much in the way of shavings. I'm fairly certain hasn't been changed previously, since I have all the service records from new and there's no mention plus a couple of the sump bolts were properly corroded and seized. I tested the solenoids in INPA and they all seem OK, but anyway these are deactivated when in limp mode and out of limp mode it goes into every gear. I also dismantled and cleaned out the selector switch to eliminate that. The gearbox temp when I've had a run in the car gets to 97 and holds, which I believe is normal. Reading around suggests an issue with the manual selector valve as it's relating to 4th gear which seems to be where the problem becomes apparent. There's a distinct slip when changing into 4th, either up or down. You can turn off the car, turn it back on and the fault indicator goes out, but when I reset the error memory I can readily recreate the same fault code after some driving. After a particularly long test drive this morning, I had some issues going from P to R, first time that's happens - it was a really rough change. Does this sound pressure related? So my next step will be to open the box up again - but that's where I need some pointers based on above. Where to start looking?
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