Key features

• •Precise Compatibility for Heavy-Duty Vehicles: Fits Allison AT545/MT640/MT643 transmissions (with OE Part Numbers: 29508036 / 29508036D) and seamlessly adapts to Blue Bird Buses, modern school buses, GMC Topkick, Chevy Kodisk, as well as many other rear-wheel-drive truck models equipped with Allison AT and MT series automatic transmissions.
• •Performance Advantages:Modern Allison transmissions use this type of electronic actuator modulator, replacing old vacuum-style ones. For Allison transmissions with shifting issues, this new modulator also works for testing and repair. Plus, its proprietary solenoid tech cuts shift lag by 40% vs. aftermarket alternatives, delivering butter-smooth gear shifts—greatly reducing driver fatigue on long hauls and protecting sensitive cargo from jolts.
• •Durable & Reliable:Built to Last Under Heavy Use – Made from high-grade materials and rigorously tested, this modulator withstands extreme conditions, ensuring long-lasting durability for demanding applications.
• •EASY TO INSTALL: The Electronic Modulator is easy to install, even for non-professionals, reducing both repair time and costs. Specifically designed for school buses and trucks, it promotes effortless installation.
• •RISK-FREE PURCHASE ASSURANCE:Our commitment is to present you with an carefree shopping journey. In the event that you find any of our electronic modulator less than satisfactory, you can contact us within 90 days. Our electronic modulator comes with an extended one-year warranty. During this one-year period, should any manufacturing defects occur, our professional and dedicated service team will be at your service promptly.