I have a brand new 4.11 ring and pinion set made by Yukon Gear for a front axle dana 35. I also have a used 4.10 gear set for a ford 8.8 with unknown miles in good condition. I will also sell the 8.8 limited slip carrier, although the limited slip clutch packs are most likely worn out. The set for the dana 35 is reverse cut, and I think it will only work for the TTB in first generation explorers. They are very hard to find in the 4.11 ratio. I paid about $280 new, and can't find them online now. I am asking $225 for this set. For the ford 8.8 set, I think $100 is fair. I will also sell the ford 8.8 limited slip carrier for $50. I would consider trades for 4.56 gears too.