I have a rattle in my 2002 F250 XL V10. It happens only in drive and going foward. The RPM is at about 2000 and happens between 25 and 45mph. It does it when it is hot and cold. It is worse when it is cold. It is a rattle sound. Just wondering if it happens to anyone elses F250.

 

My dad used to drive an 01 superduty for his company truck and it had that problem. It turned out that an exhaust or catylitic converter shield (can't remember which) had came loose and was causing the rattle. Maybe that's whats wrong with yours. Just a guess.