Excess pressure regulator bore/sleeve wear allows fluid loss and/or causes valve hang-up, preventing normal line pressure control.
Restore appropriate line pressure in all ranges by reconditioning the bore and installing Sonnax oversized pressure regulator valve kit.
Vehicles equipped with ZF6HP19, ZF6HP26 and ZF6HP32 transmissions often develop erratic or high line pressure due to excessive wear in the OE pressure regulator bore and/or sleeve. This wear allows critical oil loss, preventing proper line pressure regulation. Without correct oil pressure, the PR valve will be out of its desired position, resulting in line pressure instability and possibly restricting cooler and lube flow. Reconditioning the bore and installing Sonnax oversized pressure regulator valve kit 95740-78K renews pressure regulator action for revived line pressure control in all ranges.
Kit is NOT compatible with ZF6HP21/28/34 (Gen.2) units. To differentiate between Gen. 1 and Gen. 2 valve bodies, see ZF Identification Guide.
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.
June 29, 2016
Topics: Diagnostics And Theory Transmission ZF ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 TransmissionRead Now
January 14, 2014
Topics: Identification Guides Transmission Ford ZF ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 Transmission 6R80 Transmission 6R60 TransmissionRead Now
March 23, 2016
Topics: Diagnostics And Theory Transmission Torque Converter ZF Ford ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 Transmission ZF6HP21 Transmission ZF6HP28 Transmission ZF6HP34 Transmission 6R80 Transmission 6R60 TransmissionRead Now
June 22, 2016
Topics: Vacuum Test Guides Transmission ZF ZF6HP19 Transmission ZF6HP26 Transmission ZF6HP32 TransmissionRead Now
Contact a Sonnax Parts Distributor.
Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected. Valve must be positioned as shown to obtain an accurate vacuum test. A 6mm Allen socket and a screwdriver works well for this procedure. Screwdriver pushes sleeve outboard while the Allen socket positions the valve inboard. Vacuum test plate corner will fit snugly between screwdriver and socket to test outer port.