Hey guys just need to check and see if this is a serious problem or not one my truck is throwin p0341 and p0487 on the programmer and 2. The truck always shifts and drives perfect with no issues to date and has 78,000 miles on it but just now i got on it and around the 50+ range it wont down shift after i get my foot out of it for a second or 2. Any ideas what this could be like i said unless i get on it thats the only problem ive ever had, Its like its getting all wound up and takes a second to calm back down. Thanks in advance. Oh one more thing it also has a problem well i think every truck has this just some more than others but it can shake kinda bad around the 45 mph range any thoughts or is this normal also. Once again thanks guys.