Scotty, love your Podcasts. I have a 2010 Nissan Altima That is difficult to shift from park to drive in very cold weather. Once the car warms up or in warm weather I have no issues. Any suggestions on what it could be?

if you mean it sticks in park, often a weak brake light switch does that. If it's just tough to move, cable is binding

The shifter doesn't stick in park. I can shift into gear, I just feel resistance that makes it difficult to shift from park to drive (it is an automatic transmission). This only happens in the winter when it is very cold outside from a cold start. Once the car warms up, the problem goes away. Why does this happen only when it is cold and no other time?

It could be that with very cold temps that the transmission fluid is more thicker than when running warm or in warm temps. It could be that you give more time to warm up for the sensors to notice the temp increase to allow the transmission to shift easier between gears selection.