In Jatco/Nissan JF016E (RE0F10D) and JF017E (RE0F10E) units, the secondary pulley reducing valve supplies and regulates oil pressure to the secondary pulley actuator as commanded by the secondary pulley solenoid valve. A worn bore or valve spool can cause loss of oil pressure control in the secondary pulley circuit. Symptoms indicating a possibly degraded secondary pulley pressure control are: push-belt slippage and pulley fracture, chatter and/or RPM surge upon acceleration.
Reconditioning the bore and installing Sonnax oversized secondary pulley reducing valve kit 33510N-16K restores optimal oil pressure management in the secondary pulley circuit.

Hardcoat anodized aluminum valve combats premature wear
Oversized valve paired with OE spring matches OE pressure regulation and control

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