Just adding my experience to all the tranny threads I've been keeping track of.
Symptoms: Slipping 1-2, 2-3 and usually bad going 3-2 with hard acceleration. Also when coming to a stop 2-1 I would get a little bump as the tranny shifted to 1. Also weird delay when taking foot off the gas and putting it back on, felt like the torque converter hesitated when locking.
bought all 9 solenoids as a package (359 u.s. online) because I didn't want to figure out which ones were bad as there seemed to be more than one. Installed them and all symptoms are gone. It's like a new tranny. 2-3 is still not as responsive as the other gears but it feels like it did when i drove it off the lot over 7 years ago. The dealership recommended 20K ago that I rebuild the transmission..... lol.
Thanks again CoolAirVW for the DIY and all the useful information.