Originally Posted by projectSHO89
An 08 should be under warranty.
If so, take it to a dealer and get it serviced properly for free instead of shade-treeing it.
It is but they will just say its with in specs. Its been went over a thousand times though...some Ford trucks just don't have as much freon in them from the factory as they need to cool properly. My 04 F150 and my dads 05 both needed a can in them and then they cooled 100% better. Rather then fight the dealership about it, it takes about 2 min and $12 to add a can.
At any rate I stopped by the Ford place this morning and they showed me where the low pressure fitting is (its under/behind the air cleaner box) and the mechanic said he knew it was an issue on some trucks as well but to just add a can on my own and be done with it.