Originally Posted by Todd916
Alright I'll first describe my symptom a little better. Shortly after purchasing my truck it started with this symptom where it would have a metallic rattle just before each shift point, or roughly 2000rpm. Each time I took it to the dealer for warranty repair of rattle it was either "Unable to replicate" which is a poor excuse for WE DONT KNOW HOW TO FIX IT or they would work on it but at best would just change the RPM or harmonic Frequency which the rattle would occur.
Ok I'll keep it short. Its a design flaw.
Right below and to the rear of engine the exhaust collectors join into a single point. After that there is a roughly 4' piece of straight exhaust pipe. Holding these two things together is a u-bolt. This u-bolt is captured on top by a small piece of metal which is welded on one side to the straight pipe, and is formed around the u-bolt in effect capturing it. The 2000 RPM rattle is the other end of this small piece hitting the u-bolt clamp. By hand it doesnt move much if at all but under load is just the right frequency.
The simple, quick, free, fix is just a matter of taking a large screw driver or small prybar and bending the end of the clip up and away from the u-bolt clamp.
Hope this works for you.
My vibration is not related to a rattle or noise, it's felt in the floorboard, accelerator pedal, and the steering wheel.
Its definetly a design flaw though.