thats for both front and rear gears correct? if so thats about how much it costs. 4x4's require both gears being the same. The T-case locks both axles and they turn with each other. Different gearing will cause things to go SNAP. If its just the rear, you're getting shafted. You can install them yourself, its not that difficult. I've setup a few before on my old cars. Its is pretty critical though, and if your not mechanically inclined, don't attempt. Eating a set of gears and rebuilding an axle housing isn't fun. Smells bad too! I specifically made sure my truck had 3. 54's on it. It makes plenty of power to make up for it, and the highway mileage is nice.