Transmission Parts Aisin Seiki AS66RC Valve Body Valve / Sleeve

Symptoms:

Low cooler flow
Overheated transmission & converter
Reduced converter clutch life
Converter shudder & TCC slip

Cause:

Bore wear at the balance end of the valve reduces converter and lube flow. Boost sleeve wear results in converter pressure bleeding into and elevating EPC. Bore wear at the spring end of the valve allows the SLT circuit and regulated converter pressure to cross-leak.

Correction:

Sonnax oversized secondary pressure regulator valve kit corrects circuit pressure loss and restores control over the secondary pressure regulator valve and boost valve function.

AS66RC

Oversized Secondary Pressure Regulator Valve Kit
Part No. 122740-24K

Tooling:

F-122740-TL24
VB-FIX

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The secondary pressure regulator valve on the Aisin Seiki AS66RC can often wear out. Deterioration at the balance spool end allows for fluid loss resulting in high line pressure, harsh shifts and overheating due to reduced cooler/converter flow. Wear in the boost sleeve can result in converter pressure bleeding into the EPC.

Restore proper hydraulic integrity of the circuit by reconditioning the bore and installing Sonnax oversized secondary pressure regulator valve kit 122740-24K.

Hardcoat anodized aluminum valve combats premature wear
Highly wear-resistant boost valve sleeve increases life of part
Oversized valve maintains OE pressures

Contents

Secondary Pressure Regulator Valve
Boost Valve
Boost Sleeve
Spring

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.