I'm not really sure if you can avoid problems with the 722.6 unless you want to do a lot of tire kicking or are just not picky about color and options. There is a lot of misinformation about this transmission and many owners have not had them serviced correctly. If you catch the problems early you can repair them "cheaply" without having to do a complete rebuild. While checking the transmission on the Star diagnostics computer is important more important would be having the transmission serviced the moment you take delivery of the car even if things look good.

Personally if given the choice between having my dashboard ripped out or wiring harness issues that could cause fires and having a transmission rebuilt I would go with the transmission problems. I recently did a repair on my 722.6 transmission at my mechanic for under 1k. Evaporators are at least $2500-$3500 and wiring harness issues are $1000-$1500 for just the engine harness (your interior and the rest of your car is still riddled with biodegradable wiring that will eventually fail).