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45RFE, 545RFE, 65RFE, 66RFE, 68RFE Electronic Line Booster

45RFE, 545RFE, 65RFE, 66RFE, 68RFE Electronic Line Booster

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Quick Overview



Wiring Harness with Connectors
Pressure Regulator Spring
Fits gas and diesel units.

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.

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 works, and what results you can expect, see “Achieving a Progressive Pressure Boost in RFEs,” on page 2 of the instructions.

This part 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

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