givingit light throttle. If I hold my foot down this delays the shift to higher speed/rpms and the shift occurs smoothly. The good news is that it's done thissince we bought it in '90 and it hasn't changed a bit in that time.
jim,what you describe as slip, is that a behavior where it seems to slip out of second, the RPM level rises (since it is now effectively in neutral) and then after a little delay of maybe half a second third engages and brings it back down? if that is the case i have the same symptoms on my '74 412 wagon. it happens under low load only, not under more spirited acceleration.
at this point the only causes i can think of would be in the transmission itself.
jens ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org </x-flowed>