I think most folks on here are pushing their GMWR. On the 3rd gens... the suspension and brakes need to be upgraded for heavier duty applications. Once you do that... you can start working on getting the power back. Also, don't go crazy with stacking weight on the front end, or you will chew wheel bearings. The rear needs some beef, but can carry a lot when upgraded.You may want to re-visit how much weight your 4Runner can handle. According to the below article, the curb weight is 3,975 lb. and the gross vehicle weight rating is 5,250 lbs. Maybe these numbers are wrong and someone can correct me??? I have a 3rd gen and have wondered about maximum weight limits.