Sonnax 77987-01K 4L60E 4L65E 4L70E Pinless Forward Accumulator Piston Kit

Brand: sonnax OE Spec or Performance/Custom: Performance/Custom Type: Accumulator Piston Interchange Part Number: S74927BK Manufacturer Warranty: Yes Items Included: Pinless Forward Accumulator Piston, Piston Seals, 2 steel balls Manufacturer Part Number: 77987-01K Country/Region of Manufacture: United States Universal Fitment: Yes Vintage Part: No Performance Part: Yes 4L60-E, 4L65-E, 4L70-E Transmission Pinless Forward Accumulator Piston KitPart No. 77987-01K Dual Seal design In GM 4L60-E, 4L65-E and 4L70-E units it is common for the plastic forward accumulator piston to wear or crack. This causes a loss of fluid, resulting in delayed engagement, slips, burnt clutches and/or bands. Repeated reciprocation of the accumulator piston causes the piston pin bore to wear, while fluid loss through the piston pin bore or cracks causes forward clutch to slip. Sonnax pinless forward accumulator piston kit 77987-01K eliminates these problems. Dual seals stabilize and completely seal the