the other day i was going down the road bout 45 50 in overdrive and went to ease on the throttle and heard a pretty bad like rattling noise sound likes its comeing from the tranny but if i get on it i wont do it its just when iam cruseing and ease into and i dont think the t/c is sliping what will i notice it when the t/c slips i have never had an auto so i really dont know whats going on could yall give me some advice??? thinks for the help in advance.

 

FWIW .... I have an 05 3500, and have devoloped a rattle as well, and thought it could be the tranny. Discovered it after putting a cold air kit, removing silencer ring, and adding edge J/A , and thought that I was going to have to take everything back out. Turns out the rattle in mine is exhaust related, and I first noticed it when cruising at the same speeds as you then going back into the throttle. Tried sitting in driveway and duplicating it at the same r.p.m's while a freind hunted the noise down ... and he grabbed the exhaust while underneath and it stopped. Hopefully this may help.

 

thinks for the help man i hope thats what it is sense we both kindy had the same cases.