So today after work I got in my truck right after driving it to a work site and when I started it up it was fine but I got in and put it in reverse and when I put it into drive it was tougher than usual but I was slightly rolling back so I didn’t really think much of it. Then when I was starting to accelerate I pushed the pedal and it did nothing at first then slowly kinda started speeding up but quickly and then revved to 3k and lurched into third. What does this mean???   ^That happened the o