I tried in the cummins section one person responded so, i'll try here. Here's some back ground. I have a 02 ram 2500 auto with a cummins. Ive had the truck for about 3 months or so. Its chipped, new intake, exhaust fass pump, ect. When i first got i drove like an ***. I would also down shift sometimes to slow down. So I am assuming the effects of that is slightly burnt tranny fluid. But what is wierd is since about the time i bought it there is a vibration in my throttle pedal when shifting up from first to second. the heavier on the pedal i am the more noticeable. anyone have any ideas?