I have the transgo in my 2000 WS6 and it does shift hard and the car clunks pretty hard on the 1-2, but I don't have any vibration problems. Did you do the install yourself? I would take it back to the shop you had it done. I don't think you should be vibrating.

 

Installed a TransGo shift kit friday. First of all let me tell you that it makes your car shift like a M6. I get scratch in 2-3 at like 45 miles an hour. It also solved my rev limiter problem. (the car would not shift at wot from 2-3 consistently with my TC in). Now it shifts crisp and hard. The only problem that I am having is that it vibrates a little and is a little noiser than normal. I read a few posts saying that synthetic tranny fluid is bad. Well I didn't read those until I had finished the install so I have sythetic Mobil1 fluid in there. Could this be my problem or does anyone else have any suggestions?

 

what washer setting is yours on? 1,2,3....

i havent had any complications with my vig3200 and the shift kit whatsoever, i know it takes 6-8 hours to properly install, 6 being a pro and 8 being a novice but let me know....