TCM Control Module Adaptation - NOT Resetting the Adaptation Topic is solved

[mrbrian200]

First I read post #2 it didn't seem to make sense to me: As written, maintaining a specific RPM while the car gains speed and shifts through the gears would be impossible except (maybe) in a car equipped with a CVT.

If you can still edit that, I might recommend clarifying that with your left foot on the brake you press the accelerator to achieve the specific RPM, then release the brake pedal while holding the gas pedal at that exact position as the car gains speed and eventually flashes the triangle.

To keep the accelerator pedal at the same position, employ the 'trim panel assisted roller coaster hypermiling technique' that helps some of us overcome a natural tendency to press the gas pedal to maintain speed uphill over rolling terrain: If you have a trim panel extending to the floor to the right of the gas pedal (most Volvos I've seen do, except maybe a few older models that lacked a center console), move your foot off center to the right on the gas pedal so the side of your foot is leaning against the trim panel (note the bottom of your foot is still pressing the gas pedal). If you have big feet this helps. If you have smaller feet that can't quite span across the open space try wearing clodhoppers for the task.

Edit: if my paragraph #2 is not what you're supposed to do, sound the alarm. If I don't happen to see and edit in time, moderators are encouraged to delete any or all of this reply so as not to confuse anyone else as to the proper procedure.

[euhenius]

Hope the procedure would be the same for all AW55-50/51SN transmissions. I currently have V50 2007 with AW50-50SN and XC70 2005 with AW50-51SN. Planning to try RA + CMA on my V50 first and in case of success will do the same with my XC70.

Btw, according to relearn procedure from Rostra it is required to start with "garage shifts", will do so. Any concerns here?

[oragex]

I show a little how the relearn procedure works at the end of this video. In short, the transmission needs to light the triangle for each up-shifting and downshifting, so in total it has to learn 8 shifting points. Only, it can take many tries to make it learn one or more of these shifting points. Remember to do this repair ONLY in summer time.

Note that I kept the my original valve body and only did replace the solenoids with new ones. I do not recommend trying to 'refurbish' the old solenoids.

And I have to say that in my case the results are not perfect. The shifts are a little bumpy when cold, but perfect when warmed up with a few exceptions (when I hard brake to a stop on a downhill I get a transmission kick). Either there is some wear in the valve body or the new solenoids did not had the same adjustment as the original ones - Volvo says the original solenoids are adjusted to match each valve body when the car leaves the factory.

[euhenius]

I tried replacing solenoids with "pre adjusted" ones and can say this is complete BS. So I found a way to service (or refurbish, or clean, etc. whatever you call that) original solenoids without opening them up. It helped, but I guess re-learn is still required.

[oragex]

I tried replacing solenoids with "pre adjusted" ones and can say this is complete BS. So I found a way to service (or refurbish, or clean, etc. whatever you call that) original solenoids without opening them up. It helped, but I guess re-learn is still required.

The only thing I regret after the solenoid job, is not measuring the adjustment on the old ones and check the one in the new ones. It would have taken 5 minutes. Rostra says they are all adjusted the same, but I have a little doubt.

[Katten]

Hi guys!
I just spent about 2 hours trying to get this stuff to adapt. My car just barely will shift to 2nd at 1000rpm, no way at all to get it to 3rd. And after a shift or two the rpm drops, then what? Open throttle more? Vida states you should keep throttle steady. Gah, anyone got some advice?

[mmddyy]

• You drive the car (which can be scary depending on the trans condition until oil temp is acceptable and it shows you "Transmission Fluid Temp Too High" in the DIM Text window. VIDA warns you not to "stall" the trans to warm it faster.

• 1000RPM - Hold the pedal (hint on this one later) and let the car reach the highest gear it can at this RPM - 3rd in my car last night. Triangle will flash for a few seconds (actually it simply lights up, then turns off... don't blink or you can miss it!) and you come to a stop.

• 1200RPM - Hold the pedal and let the car reach the highest gear it can at this RPM - Probably 4th depending on terrain. Triangle will flash for a few seconds and you come to a stop.

• 1400RPM - Hold the pedal and let the car reach the highest gear it can at this RPM - Should hit 5th. Triangle will flash for a few seconds and you come to a stop.

• 1800PRM - Hold the pedal and let the car reach the highest gear it can at this RPM - Should hit 5th. Triangle will flash for a few seconds and you come to a stop.

• 2200RPM - Hold the pedal and let the car reach the highest gear it can at this RPM - Easily hit 5th. Triangle will flash for a few seconds and you come to a stop.

Thank you for the wonderful hint about the adaptation process being about holding the Acceleration PedalPosition steady instead of holding actual RPM. This made my adaptations for 1400, 1800 and 2200RPM rather easy. However, I'm struggling with 1000 and 1200RPM...

I wonder if you were able to translate each RPM with the corresponding expected pedal position please?

[oragex]

I would recommend trying the suggestions above (I also put in the video the whole Vida procedure - in the video description), then for the other gear changes that had not adapt this way, really go with your feeling, try plenty of variations of acceleration and slow down. I can say, count at least 2h driving in an area where you can reach a good speed, and obviously without much traffic. I'd also keep in mind that replacing only the solenoids, does not mean the rest of the transmission is new. These adaptations are meant for at least a complete valve body replacement, so replacing only the 3 main solenoids may well mean that some shift points will not be learned quickly by the transmission, no matter what. I would not worry, and do the best with the adaptations, then just drive that car normally every day. The best is to drive the car inside the city for a longer period to get the transmission to do often times gear changes (driving on highway for long distances without a proper adaptation may not be that good for the transmission). The transmission will slowly adapt by itself, after a longer period (perhaps several months or so). The idea with the adaptations is to 'help' the transmission learn faster to work with the newer parts.

[roywetzel]

Thanks or this super collection of info. I am dealing with a 2004 S40 with DTC's TCM-E000 and TCM 0048. Does anyone know if VIDA DICE will enable me to perform both the CMA and RA?