Aluminum Pinless Forward Accumulator Piston Kit for GM 4L60E, 4L65E, 4L70E Transmissions 77987-01K, 77998-03K

Description

• Specifically engineered for GM 4L60E (1993-2018), 4L65E (2001-2018), and 4L70E (2001-2018) automatic transmissions to effectively address common issues like delayed engagement, slipping, and burnt clutches or bands.

• Constructed from high-quality aluminum alloy with dual seals for enhanced durability and a tight, consistent seal over thousands of cycles. This robust build prevents cracks and wear common in original plastic pistons, ensuring long-lasting performance.

• Features an innovative pinless design to eliminate pin bore leakage and piston cocking, providing smoother and more consistent shifts for an improved driving experience. The stabilized piston design enhances reliability and extends transmission life.

• Designed for straightforward installation, this kit includes steel balls to plug existing pin bores in the valve body, facilitating a direct replacement with no special tools required. It’s a plug-and-play solution that helps restore normal transmission operation.

• Package includes the complete pinless forward accumulator piston kit (77987-01K, 77998-03K) with all necessary seals and steel balls for a comprehensive transmission upgrade, offering a cost-effective solution to improve shift quality and ensure reliable performance.