This during this cold Colorado winter, I first had problem shifting into 2nd gear. It would not go all the way into 2nd, I had to hold it in place while driving. After a week or two, 2nd gear seemed okay and 3rd gear became troublesome. Now, 3rd seems okay and the problem has moved to 4th gear and stayed. When driving in 4th, if I let off the accelerator, it falls out of
4th gear. I have to hold it in place very firmly.I have about 214,000 miles on this truck. I've changed the transmission fluid on a regular basis and changed it again just a few weeks ago. The fluid appeared to look red and clean.
TIA AG2