Here goes. My 2004 with the 5.4 gives out a high pitched whistle from the engine in cold weather 30 degrees F or colder. The whistle sound gets higher with acceration and goes away sometimes. My 2004 F150 did this as well but it had a 4.6. Any ideas.
My 2004 with the 5.4 litre engine(40000kms) makes a knocking sound from the tranny when slowing to a stop. It only does it when downshifting from 3rd to 2nd. The dealer says this is normal but I am having a hard time believing that. Any thoughts out there.
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