The seal near the prop is blowing grease out, how difficult is it to change the seal and can i get them from any parts store of do i have to order it from go-devil?

prob check at local car parts store but go devil sells their stuff at resonable prices. plus you might want to check to make sure the drive shaft is not wore down at the seals. if seals go unchecked silt will eat the metal away under the seals.