Just be careful with one in the rear on snowy and icie roads, NO SUDDEN THROTTLE. Both rear tires will now be getting torque at the same time, and it can put you in a spin quick. I had been driving with a rear locker only for about 4-5 years and we had a decent snow that was melting, I hit a large patchy section of snow on the road and as I went from asphalt onto the snow, it istantly put my jeep into a spin and I fliped into a ditch. It was totaly my fault as I was not paying attention when I drove onto the patch of snow. Im just saying your rear end will fish tale very easy on slick road if your not careful.. you will get used to it though. I had no problems driving it in 4x4 in the snow though. Only had a locker in the rear..... You will love the locker though, it makes a night and day differance. Just keep in mind anytime you push the throttle it will lock up, and anytime you let off the pedal it will unlock.