October 24, 2018
No transmission removal or tuning is required to improve the performance and durability of Chrysler RFE units when you install Sonnax line pressure booster kit RFE-LB1. It's an affordable, reliable upgrade for any vehicle at any power level, delivering crisp, clean shifts without low-speed harshness.
Watch this video to learn how the booster kit works, see it installed and better understand how line pressure is controlled in the RFE transmission. Click here to see all Sonnax line pressure booster kits.
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.
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