Hi I have I 1994 blaster that was making a loud squeeking from the axel, and I figgerd out it was the bearings so I bought bearrings for the rear axel, and am havind trouble removing the sproket I took off the two nuts, but I just cant get the sproket off. Is it splined on, or pushed on? How can I get it off to replace the bearrings, and how much grease should I use on the bearrings?