Anyone know much about these transmissions? Recently my truck wouldn't go into reverse. It only happened once. Checked fluid level, it was OK. Let it run for a few, and it had reverse. Also, sometimes when I first start to drive the truck, and accelerate up to speed (40+) it won't shift into third gear. I let off the throttle, and I can feel it drop in to gear. Only happens when I first start driving, after that it shifts fine. I've read that these transmissions have solenoid issues. Any experts on these here?