30,000 miles on mine and it shifts fine. But I also park in my garage when at home but it sits out at work and still no problems.
BTW where you at in East TN? I am north of Knoxville.
You don't notice anything different in the cold? Hm. Most transmissions I've used at least feel stiffer and less compliant. I'm about 40ish miles east of Knoxville in Hamblen County. How about that cold snap we had?
Airaid CAI, Roush axle-backs, Roush high flow upper grill, Raxiom Smoked Projector HIDs