thank you for your helpHello Jeff & welcome to the RC-Help web Site. i see you haven't had any Replies as of yet but i noticed a few Videos on YouTube you might be able to use to help you along ,,
(how to install a clutch linear for you nitro helicopter Thunder Tiger Raptor)
This was one of the headings i found that might help you their. I myself have never messed with one.. and I'm sure others will chime in to help.. but check that out and see if its something to help you along .. Good Luck & again welcome aboard ..