OE Number: The referencing OE number of this pinless accumulator piston kit are 77998‑03K, 77987‑01K, S74927BK, S74927K.
Easy to Install: The kit is designed for easy installation, providing a hassle solution for improving transmission normal operation and performance.
Fitment: The pinless forward accumulator piston kit is a replacement for 4L60E 4L65E 4L70E transmission, applicable for Forward 1‑2, and 3‑4, for Sonnax FWD 1‑2 and 3‑4.
Durable Design: The dual and pinless design eliminate the possibility of pin leakage, stabilizing the piston and preventing cocking for long lasting performance.
Improved Transmission Performance: The pinless accumulator piston kit helps improve shift quality, prevent slips and burnt , bands caused by accumulator piston wear.