Co-Pilot Transmission Controller

The ATS Diesel 42RLE Co-Pilot Transmission Controller is a crucial upgrade for 2007-2011 Jeep Wrangler JK models equipped with the 3.8L engine and the 42RLE automatic transmission. This system addresses the known weaknesses of the 42RLE, such as small clutch packs, weak hard parts, torque converter lock-up slip, and inadequate line pressure, which can lead to transmission failure, especially with engine modifications or larger tires. The controller itself mounts within the cabin, allowing the driver to monitor critical transmission inputs like line pressure and commanded engine load via an easy-to-read display with up or down arrow controls for on-the-fly adjustments. The system dynamically controls line pressure, increasing it up to 155 PSI when needed for towing or high-load situations, while maintaining near-stock line pressure for comfortable shifts and lower transmission temperatures during light driving. This controller offers a significant advantage over standard TCM programming for 2007-2011 Jeeps, as aftermarket TCM tuning can sometimes lead to radical pressure variations. The ATS Co-Pilot, however, uses a dynamic closed-loop control with an averaging circuit for smooth and controllable line pressure increases. It also optimizes clutch timing to reduce wear and improve reliability. Furthermore, the Co-Pilot ensures a firmer torque converter lock-up apply, which is essential for efficient power transfer and performance, particularly with the 3.8L engine. While not strictly necessary for operation, pairing the Co-Pilot with an ATS transmission or valve body can further enhance performance by increasing lubrication pressure and line pressure dramatically. The system features adjustable settings to monitor TPS position and actual transmission line pressure, with up to 155 PSI achievable. The listed fitment is for 2007-2011 Jeep Wrangler JK/JKU/TJ models with the 3.8L engine.