Welcome to the site, OEM is the superior, only aftermarket I'm aware of is china junk. I have not seen or heard of that before. The only sheave failure I've had was the fixed primary striped the splines in 9,000 miles of trail riding. Have you fired it up and run it through the gears, belts are tough you may have a tranny problem.
FLOYD, SANDI & Sadie is the co-pilot. 05 660, 3000# VENOM WINCH, LED headlight Mod, 12' led light bar RZR seats, Resi shocks, SunF 26 X 9r X 12, CUSTOM PAINT(the rescue chopper can find us know)
"REMEMBER, SPEED KILLS, BUT IT WILL BE THE ONLY TIME YOU'LL DIE LAUGHING"