Check the listing for details. New OEM Compatible with Allison AT545/MT640/MT643 Electronic Modulator 29508036. Condition: New. Listed at 319.20 USD. Precision Compatibility with Heavy-Duty Vehicles:Compatible with Allison AT545/MT640/MT643 transmissions, this electronic modulator seamlessly integrates with school buses, garbage trucks, fire engines, and commercial RWD trucks,it ensures optimal performance for fleets requiring reliable transmission control. Seamless Shift Performance:Proprietary solenoid technology reduces gear shift lag by 40% compared to aftermarket alternatives. Experience butter-smooth transitions between gears, minimizing 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, ensuri... .