I have a stock 87 4Runner with BF a/t tires, daily driver 75% hwy 25% off road. I am not interested in rock crawling; however, i frequent an area that requires me to go up a steep trail. Since there is little flex as the trail undulates and one of the tires spins it loses all traction. I'm tired of winching out each time and thinking lockers may help. I'm sure there are many variables but what is a good reliable locker for this vehicle considering how much hwy driving and the more basic the better (my theory less to go wrong but maybe not). Thanks, bobb