Hello all! I have a 2006 e66 750,
The transmission was working fine except slightly hard shifts from 3rd to 4th. Do yesterday I reset the adaptations using inpa and now it's horrible! Its slamming into almost every gear, extremely hard shifts then when it shifts from 4th to 5th the revvs will shoot up and "gearbox fault reduced acceleration" comes up on the dash.
What have I done!!
https://www.bimmerfest.com/forums/sh.../topics/839630
Check the posts by TeckFreak. Hopefully you just have to change the seals.
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On these 6HP transmission it's never a good idea to reset adaptation unless you do some mechanical work to it. Sounds you have bad solenoid(s), hence the hard shifting even before reset. Resetting them makes it worse. It will get better, so keep driving but eventually if you are lucky it will be back to same as before.
I did the same mistake on my E65 and the transmission never got even back to state it was... Until I bought new solenoids and put them in. It's been working very nicely every since and already 19k miles with new solenoids and counting.
Current rides: E65 730dA '04, F10 520dA '11, E34 520iA '91
Old rides: E46 316Ti, E53 X5, E38 728iA, E39 528iA, E46 318i Touring, E38 730dA, E36 316i, E36 328iA Cabrio, E38 728i, E38 750i, E36/3 320i, E36 318i, E39 530dA Touring, E38 740i, E39 528iA, E34 525iA, E32 750iL, E32 730iL, E34/2 525TDS, E34 525i, E28 518i, E34 535i, E34/2 525iA, E30/5 325i, E34 535i, E28 520i https://www.instagram.com/zener__/
Hello thanks for the reply, I reset the adaptations again today and followed the "calibration" procedure. Afrer around one hour of very slowly going through the gears and back it feels much much better and the tans warning hasn't come back yet. Still a hard shift into 4th probably worse than before but ill just keep easing it around for a few days and see how it goes. What solenoids could need replacing? I tested them in inpa and all come out good
Well, I changed them all. I see no point leaving any old one's if you open it up and pull out the mechatronics....
Current rides: E65 730dA '04, F10 520dA '11, E34 520iA '91
Old rides: E46 316Ti, E53 X5, E38 728iA, E39 528iA, E46 318i Touring, E38 730dA, E36 316i, E36 328iA Cabrio, E38 728i, E38 750i, E36/3 320i, E36 318i, E39 530dA Touring, E38 740i, E39 528iA, E34 525iA, E32 750iL, E32 730iL, E34/2 525TDS, E34 525i, E28 518i, E34 535i, E34/2 525iA, E30/5 325i, E34 535i, E28 520i https://www.instagram.com/zener__/
Well my car is back to normal now, if not better than before. There's still abit of a hard shift to 4th and a little hunting but its a lot better than before. For anyone else reading this I would advise NOT to reset the adaptations unless you have time and a good place to very slowly run it through all the gears for a good hour or two.
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