Ok so im driving down the interstate and floor it to pass someone and my truck shifts down and revs up and i hear i squeal start and stops when i let out of the gas, i can make it happen everytime i get in the gas. So what pulley or pullies should i look at? Its on a 92 4runner with 3.0. While it was squealing i turned the AC off so its not related to that so im guessing the fan pulley?