PART # K4F27E -SHIFT CORRECTION / ACCUMULATOR REPAIR PACKAGE,
This kit comes with 2 new patent pending accumulator pistons with sealing rings and a new Accumulator Buddy™ brush to clean and polish the accumulator bores. The O.E. design did not have rings and causes a major leak in the N/D (forward clutch) and 1-2 (burnt band) circuits. This kit includes springs to correct for low pressures and slip / T.C.C. codes. With the new pistons this kit also allows you to reuse previously damaged cases due to excessive bore wear and seals the bores to correct the wear issues and pressure loss. This kit fits Ford Focus 1999-up and Mazda FN4A-EL as well as J39A (world exports).

Superior Transmission Part # K4F27E