First off i do have a 01 tcm tune in my truck i have had this tune for about 6 months or longer with no problems. I went today and started off from a redlight i took off a WOT. When my tranny shifted from first to second it hung up in between gears and when it went in it slammed. There was a really bad screch sound that happen when it done that i beilve it was the drive shaft though it done the same thing from 2nd to 3rd 4th to 5th was like usal not bad. I dont no what the problem is now i am shifting the truck manually because i have to baby it around until i get my new ring gear which is on its way.