Description
45RFE / 545RFE / 65RFE / 66RFE / 68RFE Line Pressure Booster Kit, Sonnax RFE-LB1.
Fits gas and diesel units.
Chrysler RFE transmissions have a one-of-a-kind full-range pressure transducer in addition to a real-time adaptive closed-loop pressure control system.
As a result, increasing pressure in an RFE is not achievable in the same manner that it is in other transmissions. Installing a stronger pressure regulator spring or a larger boost valve will not work because the RFE control module will simply adapt and return pressure to OE specifications. The only way to increase pressure on an RFE is to use an electrical booster.
The RFE-LB1 Sonnax line pressure booster kit is an upgraded design over a simple resistor circuit. This new kit, which includes an integrated chip (IC) circuit and a stronger pressure regulator spring, therefore providing a 10 psi boost at lower pressure levels and a 25 psi increase at higher pressure ranges. Only Sonnax line pressure booster kits offer progressive pressure increases, resulting in smoother engagements and a lesser strain on the pump at idle, but a bigger increase in pressure when the gearbox works more.
See “Achieving a Progressive Pressure Boost in RFEs” on page 2 of the instructions for more information on how the kit works and the results you can expect.
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
