Hello! I have a 2005 300c, 5.7 that was upgraded with 6.1 internals at Arrington motors, Martinsville, VA., two years ago. Did upgrade of valve body to improve shift performance. Tranny is now toast and have replaced tranny, moved valve body from old to new tranny and replaced TCM. Trans now, (sometimes) when going into 5th gear goes into neutral. And seems sluggish when shifting gears. Do you believe the valve body needs to be replaced as well? I don't know exactly what the valve body does, but kinda makes sense with the old tranny being destroyed. Thanks for your help.