Hoosier
You tell me , how is your set - up working for you ?
Brian ,can be just the wrong screw holding the front tower.
Check the top two screws, if too long you can push into the gear box and rub the middle gear.
Not saying this is the problem , but it could be.
Other wise clicking could be one of the diff's spider gears stripping.
also check the screws for front gear case , tighten one down to hard and it can rub the front pulley.