I've had this Revo SX for about 4 years now and all the sudden the worm gear sticks and the line guide quits moving. I cleaned it and oiled it and I still have the same problem. Any solutions?

Check your pawl. It may be worn out already. They are cheap to replace. Not sure about the availability of them though, if they arent readily available, some reels can use the same pawl from other reels of different brands, Ive used shakespears baitcast pawls for my curados and revos, daiwa pawls also fit. Just go to academy or bass pro or any tackle store with your pawl and compare it to others there.

Worm gear and Pawl on these are pretty bad. The way the Revo is set up everything gets in the level wind off your line. That is what your problem is but I would advise changing both at the same time.

I have a few in stock.

Excuse my ignorance, what is a pawl?

here's a picture of what a worm gear (top) and pawl (bottom) are:

I have had to replace numerous pawls and levelwinds on Revo S's and SX's. The STX has the titanium coating on the levelwinds and I have never seen a bad one. Not expensive to replace provided you can get the parts, but the reel does have to be disassembled for the repair.

I have the Revo S same problem maybe 10 trips under its belt.. first time had a little trash in the gear the last trip threw it on the floor after same issue pissed me off so bad haven't even wanted to mess with it.. think i'm going back to heavy round reels.
Sorry for the rant but with the prices of these things you think they would put a little more quality control in there product..