I just got a Ring & Pinion (3.73's) with a Detroit Locker on the ring. The box was left at a mobil station, so the owner gave it to me. box has 2 pinion gears, one is bigger the the other, but they both have 11 teeth. the ring has 41. I have 4.56's in my rear now, how hard is to change the locker to the 4.56's, and is it poss. or should I just try to swap out all the gears and drop to 35's? Has any one done rearend work, and is it very diffacult. I have done everything on a vehicle except trans & gear work. 1972 K5 CST Blazer - 350V8 17x40x15 Made for Mud!