Symptoms:

  • Low cooler flow at idle
  • Restricted converter/lube flow
  • Engine stall at idle
  • Overheated fluid
  • Converter drain back
  • Delayed engagement
  • Lube failures

Cause:

Low cooler flow at idle and/or overheated fluid after performing aftermarket re-programming or 'tuning' the PCM/TCM for heavy duty use results in pressure demands that the OE pressure regulator valve cannot provide.

Correction:

Sonnax drop-in lube regulated pressure regulator valve restores connection to the converter circuit at idle on tuned vehicles, restoring proper converter/lube flow while preventing drainback potential from drilled castings.

45RFE, 545RFE, 65RFE, 66RFE, 68RFE

Lube Regulated Pressure Regulator Valve
Part No. 44912-17K

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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 re-programming or 'tuning' the PCM/TCM for heavy duty use. Aftermarket programming typically commands a minimum of 100 psi at idle. When the pressure regulator valve is in this position the valve can restrict the connection to the converter circuits, resulting in low cooler flow, fluid overheating and converter crowding that can cause engine stall at idle.

Installing the Sonnax drop-in lube regulated pressure regulator valve 44912-17K restores the fluid connection to the converter circuit at idle, which is especially important on tuned vehicles. 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. This check valve reseats properly to seal the converter at engine off, eliminating the delayed engagements and converter drainback issues that arise from the outdated technique of drilling a hole in the casting wall between line and lube circuits.

  • 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
  • Drop-in Zip Valve™ parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • Valve

  • 45RFE, 545RFE, 65RFE, 66RFE, 68RFE Lube Regulated Pressure Regulator Valve 44912-17K
  • 45RFE, 545RFE, 65RFE, 66RFE, 68RFE Lube Regulated Pressure Regulator Valve 44912-17K

You need this if...

45RFE, 545RFE, 65RFE, 66RFE, 68RFE Lube Regulated Pressure Regulator Valve Vacuum Test Locations