4L60E 4L65E 4L70E PINLESS FORWARD ACCUMULATOR PISTON KIT SONNAX 77987-01K

img{max-width:100%} This is a Pinless Forward Accumulator PISTON KIT for 4L60E 4L65E 4L70E GM Kit Includes: Pinless Accumulator Piston D Ring PTFE Seal 2 Steel Balls Technical Instructions Description: In GM 4L60E, 4L65E and 4L70E 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 bore to wear, while fluid loss through the piston pin bore or cracks causes forward clutch to slip. This kit eliminates these problems. Pinless design eliminates the possibility of pin bore leakage and the additional length stabilizes the piston to prevent piston cocking. Dual seals stabilize and completely seal the bore and provide a tight seal even after thousands of cycles. Steel balls plug existing pin bore in valve body.   Applications 4L60E Hummer (H3) (H3T) 2006-2010 V8 5.3L Buick Rainer 2004-2007 L6 4.2L