Sonnax is pleased to announce the release of line pressure booster kit RFE-LB1. An improved design over previous* Sonnax RFE line pressure booster kits, the RFE-LB1 fits 45RFE, 545RFE, 65RFE, 66RFE and 68RFE transmissions. This kit comes with an integrated chip (IC) circuit and a stronger pressure regulator spring, and fits both gas and diesel applications.
Only Sonnax line pressure booster kits provide progressive pressure increase which gives you smooth engagements and low speed shifts, but a greater increase in pressure as the transmission is worked harder.
The patented RFE-LB1 delivers 10 psi increase at lower pressure range and 25 psi increase at higher pressure ranges, and is ideal for heavy duty and modified vehicles; even stock transmissions when a little extra pressure is desired.
*RFE-LB1 replaces 44957-LB1 and 44957-LB2
Learn more about how the kit works and what results you can expect in Achieving a Progressive Pressure Boost in RFEs.View News Archive