September 30, 2005
Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits
Gregg Nader
Symptoms:
- Delayed engagement
- Loss of power
- Engine stall
- Low TCC release pressure
- Loss of fuel economy
- Low cooler flow
- Overheated converter
Cause:
Severe wear of the TC limit valve bore results in low oil flow into the converter circuit.Correction:
Oversize the bore with the Sonnax tool kit and install the TC limit valve kit to restore proper release oil pressure.Warning:
Extreme wear of the OE cast pump bore is possible and beyond the ability of reaming to fix. If wear gap exceeds .094", pump replacement is required.
45RFE, 545RFE, 65RFE, 66RFE, 68RFE
TC Limit Valve Kit
Part No. 44912-03K
-
Tooling:
- F-44912-TL
- VB-FIX
View Instructions Find a Distributor
Severe wear of the TC limit valve bore in listed Chrysler units results in loss of converter release oil pressure. Reduced release pressure at low speed and idle will drag the converter lining, causing engine surge, pulsation or stall. Low release pressure at cruise affects and limits efficiency, often increasing RPM and reducing fuel economy. If release pressure is low enough, the converter lining may drag enough to glaze the lining.
A worn TC limit bore contributes to converter drainback issues. Sonnax TC limit valve kit 44912-03K provides extra support for the valve to reduce future valve wear, restoring normal converter charge and cooler flow, plus correcting converter overheating problems.
Kit also serves late-model steel valve.
- Valve
- Sleeve
- Spring
- Retainer Plate
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
Chrysler 45RFE, 545RFE, 65RFE, 66RFE, 68RFE Valve Body Layout
