Hello Everyone! New to the board. I just replaced the 42rle in my son's 2006 300 Touring RWD with a used auto salvage tranny. (supposedly 90k) When I went to test drive the car, reverse was slow to drop in, when I put it in to drive(D) it started to drop in and out. (Engaging disengaging) I...

I bought my 06 300 used. I am happy with the car however when the car shifts into high gear it shudders. I took the car to my local dealer and they said the trans. checked out fine. They said the reason for the shudder was cause of the 22" wheels. they told me if i put the stock whells back on...