Built to Hold
Build guides, transmission tech, and install notes from the Gearstar shop floor. Every unit we ship is assembled by one builder, matched to your combo, and dyno-tested before it goes out the door. This is where we show the work: what holds, what grenades, and how to spec it right the first time.
Upgrading Your 6L80 Torque Converter: Performance and Benefits
SUMMARY: The 6L80 transmission, a reliable 6-speed GM system, can develop performance issues due to its stock torque converter’s wear. Upgrading to a...
Why a 3200 Stall Converter is a Game-Changer for Your 4L60E Transmission
A 3200 RPM stall converter (or torque converter) can enhance your 4L60E transmission’s performance for high-powered applications, whether that means...
Should You Modify Your 4L60E Valve Body? Pros and Cons
Modifying your 4L60E transmission’s valve body can enhance shift performance and extend transmission life but comes with risks such as installation mishaps, a...
What Happens If Your 700R4 TV Cable is Out of Adjustment?
SUMMARY:Throttle valve cables manage the hydraulic pressure and shift timing of your transmission. When the TV cable isn’t in sync with your throttle, it can affect...
Will a 4L60E Torque Converter Fit a 4L65E or a 4L80E? GM Converter Compatibility, Straight
Everything below is why, plus what to check before you buy a converter for either swap. A torque converter is a fluid coupling between the engine and an...
Why Proper Cooling is Critical for GM Transmissions: Prevent Overheating in Your 4L70E, 4L75E, or 4L65E
Effective cooling is essential to maintaining the performance and lifespan of older GM transmissions like the 4L70E, 4L75E, and 4L65E. Low or contaminated...