Electric Line Pressure Booster – 45RFE, 545RFE, 65RFE, 66RFE, 68RFE

Sonnax line pressure booster kit RFE-LB1 is an improved design over a simple resistor circuit. Featuring an integrated chip (IC) circuit and a stronger pressure regulator spring, this new kit delivers 10 psi increase at lower pressure range and 25 psi increase at higher pressure ranges. Only Sonnax line pressure booster kits provide progressive pressure increase which gives you smooth engagements and lower load on the pump at idle, but a greater increase in pressure as the transmission is worked harder. To find out more about how the kits work, and what results you can expect.Line Pressure Booster Kit Fits – 45RFE, 545RFE, 65RFE, 66RFE, 68RFE
Fits gas and diesel units.

Kit Includes:
* Wiring Harness with Connectors
* Pressure Regulator SpringChrysler RFE transmissions have a unique, full range pressure transducer and real-time adaptive closed-loop pressure control system. Because of this, it is not possible to raise pressure in an RFE the same way you would in other transmissions. The typical method of installing a stronger pressure regulator spring or larger boost valve will not work because the RFE control module will simply adapt and return pressure to OE specification. An electrical booster option is the only way to raise pressure on an RFE.Chrysler RFE transmissions have a unique, full range pressure transducer and real-time adaptive closed-loop pressure control system. Because of this, it is not possible to raise pressure in an RFE the same way you would in other transmissions. The typical method of installing a stronger pressure regulator spring or larger boost valve will not work because the RFE control module will simply adapt and return pressure to OE specification. An electrical booster option is the only way to raise pressure on an RFE.This kit is ideal for heavy duty and modified vehicles and even stock transmissions when a little extra pressure is desired.

• Achieve shorter shifts and increased torque capacity without creating low-speed harshness
• Improved clutch holding capacity for increased durability
• Progressive pressure increase as driving conditions become more demanding
• One kit fits both gas or diesel applications
• Electronic harness plugs in quickly and easily on outside of transmission case
• Works just like a large-ratio boost valve for a progressive pressure increase of about 10–25 psi
• Optional spring installed in the valve body helps optimize performance
• Ideal for all heavy-duty work/sport vehicles and around-town daily drivers

  NOTE: This kit is not recommended for use with transmission tuning mods. If you are unsure of the vehicle’s programming, use a scan tool to verify transmission line pressure meets stock levels (Drive at idle = 60 psi, Drive under heavy load = 160 psi). If desired line pressure values are greater than this, the system most likely has aftermarket tuning mods to the transmission pressure.

  Contents:

  • Pressure Regulator Spring
  • Wiring Harness with Connectors