well this started as a transmission issue, and now its an 02 sensor,
after rereading part of the thread, You have issues when it gets wet.
My issues from over saturation of the underside are that the TOD freaks out, which basically points to speed sensors grounding out from the water.
some of the most common codes have to do with the MAF and EGR cleanliness.
There is a neutral safety switch on ebay if you check..was there the otherday anyway
don't forget that your fuel pressure regulator can go bad
your windows have a tendancy to tilt if they aren't lubricated and fixed with the window fix from SBC and the abs module can go out at a moments notice,
These vehicles were HALO's a concept to production customer generating overpriced performance utility vehicle.
They aren't gonna be perfect.. especially since they were discontinued after 2001 and only 4153 (debatable) were produced in a 3 year US run.. not to include the JDMs
There is an awesome search function here that will just about pull up anything you might want to know.. and the archives are included in the search. The site is an awesome source of info.. us it to its fullest
Happy New Year
Jeff