Motor Replacement for Mighty Mule, GTO, Fits series: FM500, MM500, FM502, MM502, FM 350, MM350, FM352, MM352, FM600, MM600. GTO/PRO SW 1500, SW 2500, SW 2502, SW 2550. Gate Opener Arms! Improved Design + Direct Replacement Revised Installation Instructions Provided 2 Year Warranty, 50% Anytime after 2 Years! Customer Service (830) 339-9652