as the title says, i have a 5 year old troy built ride on mower. i noticed a mild vubration when cutting grass last year so i changed the blades at the start of this year. while changing the blades i noticd that one was a fair bit harder to turn than the other. i do not recall running over anything. when i engage the deck there is a small squeak and everything goes well. it mows well, but when i hit heavy (city here) 4 to 5 inch grass i still get the vibration. i also just learned about greasing the spindles. thx for any help.