You can choose more than one responce to the poll. I searched and found that a lot of people have that problem until it warms up. But mine just started happening. What happened was 2 days ago I put it in 4 :1 low to see how it drive, the transmission obviously whined when I did that. But yesterday I took the truck out, and it whined the whole time, and shifted too soft into drive and reverse. This morning (cold out) I warmed up the engine, then drove it out, still whining, drove down the street, turned around and came home, whining the whole time. Theres no water in the fluid, but it looked a little dirty, do you suggest a fluid change (about 2-300 miles MAX on it)? also I read on here that type F is less slippery, so it shifts firmer, and that a couple guys here run it. what do you think would help?