ATS 601-904-4248 Allison 5-Speed Conversion Co-Pilot Transmission Controller | 2001-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax

The ATS 601-904-4248 Allison 5-Speed Conversion Co-Pilot Transmission Controller is engineered to enhance the performance and reliability of 2001–2005 GM 6.6L Duramax trucks equipped with the Allison 1000 5-speed automatic transmission. This controller is particularly beneficial for vehicles with performance modifications, as it addresses the limitations of the stock transmission under increased power demands.

Key Features & Specifications

• Transmission Pressure Control: Utilizes inputs from the Manifold Absolute Pressure (MAP), Vehicle Speed Sensor (VSS), and Throttle Position Sensor (TPS) to dynamically adjust transmission line pressure. This ensures optimal clutch engagement and torque converter lockup, reducing the risk of slippage and overheating.

• Enhanced Torque Capacity: Increases the transmission's ability to handle approximately 85 additional horsepower and 120 lb-ft of torque over the stock configuration. This is achieved without the need for internal transmission modifications, effectively preventing the common "Fail Safe" mode activation under high power conditions.

• Increased Line Pressure: Elevates clutch pack apply pressure from the stock 86 PSI to approximately 230 PSI in 5th gear, providing more than 2.5 times the stock pressure. This substantial increase ensures firmer shifts and improved power transfer to the wheels.

• Race Mode Feature: Offers a user-selectable "Race Mode" that forces torque converter lockup after the 1-2 shift, maintaining full line pressure for maximum performance during high-demand situations.

• Exhaust Brake Integration: Compatible with exhaust brake systems, enhancing vehicle control and braking efficiency, especially when towing or descending steep grades.

• Vehicle Compatibility: Designed for 2001–2005 Chevrolet Silverado and GMC Sierra 2500HD/3500HD models equipped with the 6.6L Duramax engine and Allison 1000 5-speed transmission.

• Warranty: Backed by a 5-year/500,000-mile limited warranty, providing assurance of the product's durability and performance.

Please note that while this controller significantly enhances transmission performance, it requires the user to supply specific sensors (MAP, VSS, TPS) for full functionality.