I have a '94 YJ 2.5L with stick, stock as a stove. 4 sources say my knock could be a loose flywheel. The noise does seem to be coming from there and the flywheel moves some before meeting resistance by hand. Engine with pan off looks fine. Do I need to separate the engine from the trans to tighten the flywheel and/ or clutch bolts? Rebuilt engine, newly reassembled by shade tree mechanic. I need to do the work myself. If someone is going to screw up my Jeep, it's gonna be me!