Product Description
4A727 A904 Lube Regulated Pressure Regulator Valve
1962-1977
Sonnax Part Number: 22771A-10K
NO TOOLING REQUIRED
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 This outdated technique contributes to slow engagements or — if the hole is improperly drilled — excessive converter pressure and low line pressure.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
PACKAGE CONTAINS
- Valve (1)
SYMPTOMS
- Delayed engagement
- Converter bushing failure
- Pressure regulator buzz
- Lube failures
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.
