Symptoms:

  • Delayed engagement
  • Lube failures
  • Converter bushing failure
  • Pressure regulator buzz

Cause:

Poor converter feed restricts oil flow to converter/lube circuit, but common aftermarket methods of drilling the valve body to improve lube aggravate existing converter drainback problems.

Correction:

Sonnax drop-in valve regulates lube to improve converter feed at low RPM and high throttle conditions while preventing drainback.

A727, A904

Lube Regulated Pressure Regulator Valve
Part No. 22771A-10K

Fits '62–'77 units.

View Instructions Find a Distributor

Under extreme pressure or temperature conditions, the converter/lube circuit in listed Chrysler RWD units can be restricted by the PR valve. The practice of drilling a hole between passages is problematic. This outdated technique contributes to slow engagements or — if the hole is improperly drilled — excessive converter pressure and low line pressure.

The best way to improve oil flow is to replace the OE valve with Sonnax lube regulator pressure regulator valve 22771A-10K, which ensures oil flow under extreme operating conditions and prevents drainback when the truck is off.

  • Improves converter feed/lube oil flow at critical low RPM and high load conditions
  • Redesigned valve prevents fluid drainback and slow engagements
  • Helps charge the converter in Park
  • Drop-in Zip Valve™ installs quickly and easily
Learn More About Zip Valve™ Drop-In Repairs

No valve body modifications required.

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 A727, A904 Valve Body Layout

Chrysler A727, A904 Valve Body Layout

  • A727, A904 Lube Regulated Pressure Regulator Valve 22771A-10K
  • A727, A904 Lube Regulated Pressure Regulator Valve 22771A-10K
  • A727, A904 Lube Regulated Pressure Regulator Valve 22771A-10K details