Overdrive clutches in listed Hyundai/Kia transmissions are applied in fourth, fifth and sixth gears in conjunction with other clutch packs. As the overdrive pressure control valve oscillates and strokes over time, bore deterioration results, which prevents proper hydraulic control of the OD clutch pack. This can cause flares, slipping, erratic clutch apply timing, ratio codes, and burnt overdrive clutches.
Reconditioning the bore and installing Sonnax oversized overdrive pressure control valve kit 102741-18K returns normal shift operation by restoring hydraulic integrity to the OD circuit.
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.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.