Some Honda 4/5 speed automatic transmissions may have undesirable up/downshifts caused by worn CPC valves. These shifting problems can vary depending on the specific application (see chart). As bore wear for CPC A, B or C become excessive, control over clutch apply and release pressure is lost. If clutch pressure is not properly reduced, the up/downshifts can be harsh. If bore wear results in a loss of clutch apply pressure, a flare up/downshift occurs and friction elements overheat. Depending on application, the CPC valves also can affect TCC engagement and control. Proper shifting and, in some cases TCC function, can be restored by reconditioning the bore and installing Sonnax oversized CPC valve kit 98892-23K.

• Annular grooves help center valve in bore to reduce future side-load wear
• Hardcoat anodized aluminum valve combats premature wear
• Valve utilizes metering notches for smoother function