Fixing Transmission Heat with a 10r80 Thermal Bypass Delete

If you're tired of seeing your trans temps climb into the 200s during a normal commute, a 10r80 thermal bypass delete might be the simplest and most effective mod you can do. It's one of those parts that makes you wonder why the factory didn't just set things up this way from the start. If you drive a newer F-150, a Mustang, or even a Ranger equipped with the 10-speed, you've probably noticed that the transmission likes to run hot—like, really hot. We're talking 195 to 210 degrees Fahrenheit just cruising down the highway. For many of us who grew up around older trucks where 170 degrees was the sweet spot, those numbers are enough to cause a bit of anxiety. ...

February 20, 2026 · 7 min · Daskey Heidy