Yankee Clipper wrote:
What you are experiencing is what's call the "460 roar." The transmission intercooler kicks in when the engine temp goes up under load, and between the mechanical and turbo noise, it can startle you even after you think you're ready for it. The good news is I can watch the engine temp go down almost immediately after the intercooler kicks in.
One piece of advice: if you're towing in hot weather, give the engine a chance to cool down some before you shut down the engine, otherwise the exhaust manifolds might tend to warp and spit bolt caps off. Happened to me, and I had to replace both the right manifold and the bolt set (and Ford gets $112 for a set of manifold bolts (really)). Hope this helps,
Appreciate the tips. Thanks!