Transmission Parts Aisin Seiki AS66RC Valve Body Valve / Sleeve

Symptoms:

TCC codes
Converter shudder
Overheated fluid, bushings & converter
Low SLT pressure

Cause:

Bore wear in the boost sleeve allows SLT pressure to exhaust, preventing proper throttle-related control of regulated converter charge pressure.

Correction:

Sonnax drop-in secondary pressure regulator plunger valve kit restores hydraulic control by preventing SLT pressure to exhaust, restoring proper control of the converter charge circuit at the secondary pressure regulator valve.

Warning:

The AS66RC (gas) and AS69RC (diesel) secondary pressure regulator plunger valves are different diameters and should not be interchanged, as different converter charge pressures will result. Measure the plunger valve and/or reference sleeve slot to determine proper replacement kit.

AS66RC

Secondary Pressure Regulator Plunger Valve Kit
Part No. 122740-03K

Fits gas units only with .255" dia. plunger valve.

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A worn secondary pressure regulator plunger valve sleeve in AS66RC transmissions can cause reduced SLT pressure, TCC codes and shudder and overheating. The plunger valve is reacted on by SLT pressure, which allows throttle control of the converter charge circuit. As the OE sleeve wears, SLT pressure exhausts, compromising the converter charge circuit and resulting in the noted symptoms. Sonnax secondary pressure regulator plunger valve kit 122740-03K restores the hydraulic control and fixes these issues.

Hardcoat anodized aluminum plunger valve combats premature wear
Upgraded sleeve material is highly wear-resistant to increase life
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

Contents

Plunger Valve
Plunger Sleeve

Valve Body Layout

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.