Hey boys (and girls)... I'm in need of some assistance once again... I have a 2000 Silverado 4x4 with 162,000 miles. I just had to take a trip home to GA (I'm in NC). The transmission started to shift pretty hard from 1st to 2nd. I checked my fluid, and it was a bit low, so I topped it off with Dexron III. I topped it off and the hard shifting seemed to stop. I drove it about 300 miles with no problems, though most of those were interstate miles. I drove it around several other times on my trip, with no problems. Yesterday, I'm heading home, and I notice the hard shifting again. I check the fluid and everything is fine. I cut the truck off and pumped gas. As soon as I started again... Smooth shifting again... Strange, huh? Any ideas?