Originally Posted by smokin95psd
08 f450 4x4 with 4.30 gears. under accel. and decel. the truck sounds like a real loud exhaust leak. not under normal cruising just under accel and decel. please help i am 900 miles from home and the Ford dealer said drive it he had never heard of the problem.
Where is it coming from, can you tell? You might have a blown flex joint on the up-pipe and unless you feel comfortable with un-bolting the cab and messing with the downpipe I suggest you take it to the dealership, especially if its under warranty