Need advise in a hurry

[Bradley3054]

I have a e99 f250 with chip and 8 lift and 37s and tow a good amount my trans oil is starting to smell burnt so i need to change it now but what is good oil to use so i can order it now and is my a shallow pan or deep pan? also my trans oil seems to like to get pretty hot idk if i trust my guage might be in accurate but sometime up to 280 on a hot day just driving highway. i have a 6.0 trans cooler waiting to go in to whats everything i need to install that too? really need advise quickly so i can get this stuff before i leave work and do this tn. btw my trans does not slip or anything runs fine.