I recently purchased a Lightning rearend with the 4.10 ratio and trac-loc. It had some damage to spider gears. I repaired damage and have installed it in my 93 ext cab short bed. Also put front and rear sway bars from Lightning. Wow the 4.10 gears really make it snappy. It seems fine on highway with the OD. Sway bars are great! I now have a complete 3.55 rear to sell. It worked perfectly when pulled. Brake lines and cables are all on it. Could help out you with the LAZY 3.08 gears. My mileage didn't seem to change when I changed gears. I guess engine is more relaxed. Anyway, I would sell complete rear for $250. E-mail me if interested. I tried to post it on classifieds, but couldn't make it work. address is MikeS@aerocell.net