Upgrading to a PerformaBuilt 4L60E Transmission

If you're tired of your truck or muscle car feeling like it's searching for gears every time you hit a hill, swapping to a performabuilt 4l60e transmission might be the best move you make this year. Let's be real for a second: the stock 4L60E gets a lot of hate in the car community. People call it a "slushbox" or a glass transmission, and while that's a bit harsh, it's not entirely unfounded. When you start adding horsepower or towing heavy loads, the factory internals just weren't designed to keep up with that kind of abuse. ...

February 15, 2026 · 6 min · Regan Aviv