Description
45RFE / 545RFE / 65RFE / 66RFE / 68RFE Oversized Lube Regulated Pressure Regulator Valve Kit, Sonnax 44912-15K.
Vehicles equipped with Chrysler 45RFE, 545RFE, 65RFE, 66RFE and 68RFE transmissions can develop low cooler flow at idle and/or overheated fluid issues after performing aftermarket reprogramming or ‘tuning’ the PCM/TCM for heavy duty use. Aftermarket programming typically commands a minimum of 100 psi at idle, which the OE pressure regulator cannot provide. This causes the valve to restrict the connection to the converter circuits. Additionally, poor line pressure control can be the result of excessive wear in the pressure regulator valve bore. Also, this wear allows critical oil loss, which can cause lowered line pressure, soft shifting and burnt clutches, or high line pressure and harsh shifts.
Reconditioning the bore and installing Sonnax oversized lube regulated 45RFE Regulator Valve Kit 44912-15K restores pressure regulator action for line pressure control in all ranges. This valve has an internal check valve that ensures proper converter and lube oil flow under extreme ‘tuned’ operating conditions, eliminating the fluid overheat and converter related engine stalls at idle.
- Hardcoat anodized aluminum valve combats premature wear
- Charges the converter/lube circuits at low RPM, especially important in ‘tuned’ vehicles
- Improves converter feed/lube oil flow at critical low RPM and high load conditions
- Redesigned valve prevents fluid drainback & slow engagements
- Annular grooves help center valve in bore to reduce side-load wear
- Kit includes selective springs for OE pressure, or for use with Sonnax line pressure booster kit, RFE-LB1
- Valve
- Green Spring Selective, OE Pressure
- Yellow Spring Selective, Use with RFE-LB1
