Line Pressure Booster Kit

The Sonnax RFE-LB1 is an advanced line pressure booster kit specifically designed for Chrysler RFE automatic transmissions, including the 45RFE, 5-45RFE, 68RFE, 65RFE, and 66RFE models. Chrysler's RFE transmissions feature a unique pressure control system that typically adapts to modifications, making conventional pressure-raising methods ineffective. This Sonnax kit bypasses the adaptive control by employing an electrical booster. It integrates an IC circuit with a stronger pressure regulator spring to progressively increase line pressure. At lower operating pressures, users can expect a 10 psi increase, while at higher pressures, the boost reaches up to 25 psi. This calibrated increase is crucial for enhancing transmission performance and longevity. The progressive nature of the Sonnax RFE-LB1 is a key benefit. It provides smooth clutch engagements during normal driving and at idle, minimizing harshness and reducing load on the transmission pump. As driving demands increase, the kit delivers a more substantial pressure boost, ensuring firmer shifts and improved torque handling capabilities.