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  • Lube failures
  • Delayed engagement
  • Converter drain back


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


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.


Oversized Lube Regulated Pressure Regulator Valve & Line/TV Pressure Plug Kit
Part No. 22771A-16K

You need this if... View Instructions

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 drain back problem because ATF can drain when the engine is turned off.

Sonnax offers oversized lube regulated pressure regulator valve and line/TV pressure plug kit 22771A-16 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 drain back.
  • Kit includes a matched oversized line/TV pressure plug and pressure regulator spring.
  • Pressure Regulator Valve
  • Line/TV Pressure Plug Assembly
  • Pressure Regulator Spring

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

42 48rhefamily

  • 22771a 16k combo
  • 22771a 16k
  • 22771a 16k alt

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

  • 22771a 16k in test