Hi I have a Tremec TKO 600, had it since '06. Last time at the track it wouldn't go into 4th of all gears, I know 4th is an easy one but facts are facts. Only go to track a couple times a year... It shifts ok on the street, except being very notchey (if that is a word) . Any way my thought were to have the gears redone somewhere and Liberty gears came up.. Should make shifting a breeze.?? Anyone use them. Also Modular Mustang Racing sound good. Anyone can sound good on paper though... Anyone have any input?? Thoughts ??