I pulled the cover to my 12 bolt for Three reasons: To find out my gear ratio for 35x12.50 tires, to fix the leaky gasket, and to cheak for wear. Now I am more confused than ever reading old posts about how to determine my gear ratio. I have a 12 bolt rear end. No numbers stamped on gear that I can find to resemble anything listed in the forums. I counted outer teeth 5 times and came up with 34 teeth. Not 41 as everyone says are supposed to be there. The pinion gear has 10 teeth. I counted 5 times and could be off by maybe 1. It MAY have 11 but I think only 10. Whats my gear ratio? I bougtht RTV sealent. Should I seal both the housing and the cover? with the gasket sandwiched in between. For all those that care...no metal shaving or teeth in my drained oil!