4L60 Sonnax Reverse Boost Valve Kit K77898

Sonnax Reverse Boost Valve Kit

Genuine Sonnax Reverse Boost Valve Kit for the GM, Chevrolet, GMC, Cadillac 4L60 automatic transmission. Sonnax parts are the aftermarket standard for transmission repair and performance, engineered to correct common failure points and add durability beyond the original design.

Fitment

Fits 200-4R / 4L60 units. Sonnax part number K77898.

Why Sonnax

Trusted by professional builders and performance shops, Sonnax components are made in the USA to exacting tolerances. This is a direct-fit upgrade for a 4L60 rebuild or repair.

Shipping & Support

Fast shipping and knowledgeable support on every 4L60 order.

Special Order

This Sonnax part is available by special order. Contact us for current price and availability before ordering.