Universal Pinless Piston Kit for 4L60-E, 4L65-E, 4L70-E Transmissions

This piston kit enhances the performance and longevity of 4L60-E, 4L65-E, and 4L70-E transmission units by addressing and preventing issues with accumulator pistons. Key Features: Enhanced Sealing: Dual seals ensure a robust, enduring seal in the bore, maintaining integrity even after numerous cycles.Pinless Accumulator Pistons: Our design removes the risk of pin leakage and stabilizes the piston to prevent cocking.Durable Material: The kit includes high-quality aluminum pistons and steel balls to replace commonly worn parts. Benefits: Prevents Fluid Loss: Replaces the prone-to-wear plastic forward accumulator piston to avoid delayed engagement and transmission slips.Improves Shift Quality: The pinless design mitigates wear at the piston pin bore interface, preserving shift quality and preventing transmission damage. Kit Components: 77987-01K:Piston, D-Ring, PTFE Seal, 2 Steel Balls77998-03K (2-Piece Set):2 Pinless Accumulator Pistons (Aluminum), 2 D-Rings, 2 PTFE Seals, 2 Steel Ba