Tool Required VB-FIX Required

Printpartsummary
Symptoms:
  • Converter drainback
  • Delayed engagement
  • Lube failures
Cause:

Poor converter line feed pressure caused by worn-out pressure regulator bores leads to delayed engagements and pump bushing and lube failure.

Correction:

The Sonnax steel valve kit offers increased stability while lube regulation improves converter feed at low RPM and high throttle conditions and allows bores to be oversized.

Tool Required VB-FIX Required

48RE

Oversized Lube Regulated Pressure Regulator Valve & Line/TV Pressure Plug Kit

Part No.

22771A-16K

Oversized Lube Regulated Pressure Regulator Valve & Line/TV Pressure Plug Kit
  • 22771a-16k_combo

  • Oversized Lube Regulated Pressure Regulator Valve & Line/TV Pressure Plug Kit

  • 22771a-16k_alt

Small_22771a-16k_combo Small_22771a-16k Small_22771a-16k_alt

48RE

Oversized Lube Regulated Pressure Regulator Valve & Line/TV Pressure Plug Kit

Part No. 22771A-16K

  • Pressure Regulator Valve
  • Line/TV Pressure Plug Assembly
  • Pressure Regulator Spring

Complaint:

  • Converter drainback
  • Delayed engagement
  • Lube failures

Cause:

Poor converter line feed pressure caused by worn-out pressure regulator bores leads to delayed engagements and pump bushing and lube failure.


Correction:

The Sonnax steel valve kit offers increased stability while lube regulation improves converter feed at low RPM and high throttle conditions and allows bores to be oversized.

In Chrysler 48RE units, the cooler/converter charge circuit is not opened until the pressure regulator valve moves far enough to flow oil. The industry fix of drilling a small orifice between line pressure and cooler circuit ensures flow to the converter/lube circuit, but the hole also increases the converter drainback problem because ATF can drain when the engine is turned off. Sonnax now offers 22771A-16K, an oversized lube regulated pressure regulator valve and line/TV pressure plug kit that allows rebuilders to salvage worn valve bodies.

  • Oversized pressure regulator valve is designed with an internal check valve that allows oil to flow into the converter charge circuit as soon as the vehicle is started.
  • Internal valve shuts down once line pressure reaches normal levels.
  • With engine off, the internal check valve prevents fluid from draining out through the orifice, reducing converter drainback.
  • Kit includes a matched oversized line/TV pressure plug and pressure regulator spring.
  • Patent No. 6,712,726

Required Tools

Related Parts

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Valve Body Layouts

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.

Valve Body Layout Chrysler 42-46-47-48RH/RE
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