I have a 2009 1500 model only 13,000 miles on the truck Symptom: When the truck is placed in Overdrive and you place your foot on the accelerator there is a rattling noise. It happens more when you just slightly tap it and let off. When you put the truck in 3rd gear the noise goes away. Other then the noise the truck is running good. Another concern I've had since I bought the truck brand new: When I stop the truck at a red light it will sometimes sit there for 3-7 seconds and finally shift into first gear hard. Any input before I bring the truck to the dealer?