Transmission shift hesitation when cold
I have a 2001 Jetta TDI that is unfortunatly equipted with an Automatic transmission. Since the weather has gotten cold I have noticed that the transmission will hesitate between 2nd and 3rd gear giving a slight neutral feel. Once the car warms up the transmission shifts perfectly normal, I can't make it slip or act up at all. I had the transmission rebuilt about 50,000 miles ago and have had very little trouble with it. I'm not a hot rod driver and the care is bone stock with 225,000 total miles. The transmission fluid was changed only 10,000 miles ago.
I have heard that the transmission shift valve is know to have issues and wonder if my issue might be an indication that it needs replacing? Any suggestions would be greatly appreciated.