Replaced clutch now my jeep won't start
 

I have replace the clutch in my xj and as far as I can see plugged everything back up but now my jeep won't start. It started fine before I took anything apart. Also there is a loose fitting sensor in the top of my tranny that I'm not sure what it us or does. Please help

What kind of "won't start?" There's a safety disconnect in the clutch system that disables the starter when you don't have the clutch pushed in. There's supposed to be a fuse you can take out, and the PO of my Jeep did, because I can start 'er up without pushing the clutch in.

It will turn over just wont fire

Did you reconnect the crankshaft position sensor?

I'm betting that "loose fitting sensor" on your tranny is your crank position sensor. Get that put in and bolted down. Without that, your Jeep pretty much won't start if I interpret my manual correctly. If that sensor is unplugged, not positioned right, or dead... you'll get nothing when you turn her over.