Holley Tru-Shift System

The Holley Tru-Shift System by Bowler Performance Transmissions is a precision electronic shift control module engineered for high-performance automatic transmissions in modified vehicles and racing applications. This system is designed for serious enthusiasts and professional mechanics who demand repeatable, lightning-fast gear changes without the unpredictability of manual valving or traditional hydraulic controls. If you're building a street strip car, bracket racer, or high-horsepower cruiser with an automatic, the Tru-Shift delivers the shift consistency that separates fast passes from slow ones.

The Holley Tru-Shift System integrates digital logic and solenoid management to override stock transmission programming, allowing custom shift points, gear hold, and launch control tuning through a compact control unit. Unlike crude line-pressure modulators, this system gives you real-time adjustment capability—dial in your shift RPM, tune for tire spin under load, and hold gears exactly where you want them during acceleration. The lightweight design (1.3 lbs) means minimal installation weight penalty, while the compact footprint (7 x 3 x 12 inches) fits easily under the dash or in an engine bay alongside other performance electronics, making it ideal for tight build spaces where every cubic inch counts.

Professional drag racers, weekend bracket competitors, and street car builders rely on the Tru-Shift to eliminate the guesswork in transmission tuning and achieve consistent ET consistency run after run. Installation requires basic wiring knowledge and familiarity with your transmission's valve body architecture; work with a qualified transmission builder or performance shop if you're unfamiliar with modern automatic transmission electronics. Compatibility spans most modern Holley-equipped performance transmissions and custom builds where electronic shift control adds reliability and repeatability that purely mechanical systems cannot match.