Gen 4 6L80/6L90 Transmission tune

Tune your transmission for firmer shifts, higher shift points and torque converter tweaks.

⚠️ Worried About the 6L80 Shudder?

If you own a GM truck or SUV with a 6L80, you’ve probably heard about the dreaded torque converter shudder.

But why wait until there’s a problem?

A properly calibrated transmission tune can change how the torque converter clutch (TCC) is commanded and help reduce unnecessary slipping and heat — two things that can contribute to accelerated converter and transmission wear.

At Custom LS Tunes, we can adjust your 6L80 calibration to improve:

🔧 Torque converter lockup strategy
🔧 TCC apply/release behavior
🔧 Shift scheduling
🔧 Line pressure and shift feel
🔧 Transmission behavior for your specific setup

Whether your truck is stock, cammed, lifted, running larger tires, or has different gearing, the transmission calibration should match how the truck is actually being used.

Want to help protect your 6L80 before the shudder starts?

Send us a message and let’s get it dialed in.

Custom LS Tunes
Remote custom tuning for Gen III & Gen IV GM trucks and LS-powered vehicles.