i have typed this out so many times, it's time to post this up, considering the amount of issues that can be solved, just buy resetting the tcu. not limited to, but including...
1. clearing TCU codes without vagcom
2. default tranny settings
3. throttle readaptation (critical when doing any tranny or engine work). The ecu and tcu works together on many things. clear ecu also for engine work.
the definitive answer. as follows...
1.key on (dont start, just turn the car on)
2.gas down to floor for 10 sec
3.while holding gas, turn key off
4.let go of gas
5.key on (again, on, dont start) for 5 min (for throttle readaptation). touch nothing.
6.then start while touching nothing.
7.drive and see what happens.
its not uncommon to have to do this over and over, because u make small changes and forget to reset yet again. i cant count the # of posts where people change 99 things and reset 99 times, only to make one last change, forget the final reset, then give up and shoot the car with a shotgun. so for those that missed it *always reset last!*
This method is not needed for the 3speed 010, as that has no tcu and yes, this reset can be done thru vagcom too!
final note. i have done this method so many times for all my auto 4speeds, and it works everytime! if it doesnt, there is another issue that needs solving. hence, begin solving all issues my reset (easy, free, 5min). then, if needed, go to vagcom. after changes, reset. and so on until everything works perfectly. refer to my other post about solenoids and other DIYs about valve body cleaning and other issues. dont give up folks!!! usually its simple stuff to fix it.
Additionally, this is intended to complement a TBA (throttle body adaptation) performed in vcds/vagcom, not replace it. In any car, this will reset the transmission relationship with the TB, not necessarily reset the TB itself. That can only be done electronically with vcds (usually group 60 in basic settings).
edit: Works on all vw 4/5/6 speed auto transmissions from 1988 with the 096 corrado to present. I haven't confirmed DSG, but I'm 99% positive it will work. i have confirmed this method works for the 5 and 6speed tiptronics also. i have (had) a mk5 jetta, b5 passat and a b5 and b7 a4, and it works on all of these cars! I do this every gas fill-up.