I'm finally going to put lockers on my tj: Detroit EZ in the rear and TruTracs in front. I have a Rocky Mountain edition TJ: Dana 30 & Dana 44, 3.73 gears. I've decided to stick with the 3.73 for now as I drive it on the road a lot too. I can't figure out if I have 27 or 30 spline gears. How do I tell? I've sent for the factory info, but don't see anything there. . . Anyone know?