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transmission adaptation - is it possible to adjust it? 850 1995

posted by  someone claiming to be yuri on  Mon Oct 28 16:04 CST 2002 [RELATED]

My '95 w/ 117k miles, shifts somewhat hard from 1st to 2nd, then it shifts fine (2-3 and 3-4). About a year ago I installed fog lights and used volvo connector and switch w/ PIAA lights.
It is possible that during installation, I opened a circuit (pulled a wire)that carries signal from speedometer to transmission. The result was:
tranny would not shift into 2nd gear until engine riched ~3,000 rpms, howewver, it would happen only once after the car was started, and after that the tranny would shift fine - if I remember well, even better/softer then before,
Also, SPORTS/ECONO switch and orange UP ARROW did not light up at all.

I had to go to the dealer, who fixed the problem. the mechanich who worked on the car told me "they all shift like yours" (850s), but mentioned that the tranny on 850 is adapting one and the adaptation can be re-set w/ a computer.

***I did a full flash w/ a dyno fluid a year ago, and the w/ syntetic (Mobil) about 7 months back.

Any comments appreciated.








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    transmission adaptation - is it possible to adjust it? 850 1995

    posted by  someone claiming to be Ray N. on  Mon Oct 28 16:25 CST 2002 [RELATED]

    I've reset the transmission to the point where I hear it make a clunk
    inside the transmission housing. I don't know if that clears the
    software settings, though. To do it, as i recall,

    jumper to a1

    turn on ignition

    read first code by pressing once on switch

    repeat til all codes read

    hold down button for 5 seconds 9thats when it clunks).

    Again, I may have the exact sequence wrong but I definitly got it to do something. I recall i did this when I was reading the tranny error codes
    when the PNP switch was failing.

    Also, when cold, the first gear shift point is set higher to shorten
    warm-up time (so it may be normal if it happens when cold).







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      transmission adaptation - is it possible to adjust it? 850 1995

      posted by  someone claiming to be yuri on  Mon Oct 28 16:33 CST 2002 [RELATED]

      Thanks for reply - my tranny did not have any codes. I just got fed up w/ this hard shift 1 to 2nd so I started thinking of a way to make shift smoother.
      The re-set as described is supposed to be done by a dealer's computer.








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        transmission adaptation - is it possible to adjust it? 850 1995

        posted by  someone claiming to be Ben on  Tue Oct 29 00:00 CST 2002 [RELATED]

        ONLY the '99 on up cars can have their trans adaption mode set by the PC. The PC doesn't connect to older cars, not possible.








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          transmission adaptation - is it possible to adjust it? 850 1995

          posted by  someone claiming to be Yuri on  Thu Oct 31 15:33 CST 2002 [RELATED]

          Thanks,Ben. Can you think of something else I can do to make tranny shift smoother?







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