I have 1998 12 valve with overdrive automatic transmission - see sig. For the past year every once in a while when I would put it to drive from park and try to take off she would bog down. i f I give it more pedal the engine will stall. If I take off pedal and shift back into N or P or R than back to drive she takes off fine and normal. This had only happended to me a few times until I change the fluid. Now it happens once or twice a day while using the truck for work (constant stop, park, start). The only thing I can think of is that the fluid is possibly to full, although it show ok on the dipstick. Is it possible for the transmission to have too much fluid causing it to lock up. Anybody else have this problem??