Accumulator Piston Kit / Signal Accumulator / Gm 6t30 (gen 2) / 6t31 (gen. 3 6T40) / 6t35 (gen. 3 6T40) / 6T40 (gen 2) 6t41 (gen. 3 6T40) / 6t46 (gen. 3 6T40) / 6t51 (gen. 3 6T40)

Sonnax Accumulator Piston Kit for GM 6T40 6T30 6T31 6T35 6T41 6T46 6T51 Transmissions | Chevrolet/GM

Restore proper hydraulic control in your GM 6-speed automatic with this Sonnax Accumulator Piston Kit (SKU 144740-40K). Engineered as a signal accumulator solution, it addresses worn or cracked accumulator pistons that can cause harsh shifts, flares, and pressure loss. Manufactured by Sonnax, this kit delivers OE-quality fitment and durability for a range of 6T-series transmissions.

Key Features

• Direct replacement for the signal accumulator piston in GM 6T30 (Gen 2), 6T31, 6T35, 6T40 (Gen 2), 6T41, 6T46, and 6T51 (Gen 3 6T40) units
• Precision-machined by Sonnax to meet or exceed OEM specifications for reliable hydraulic sealing
• Helps eliminate shift flare, harsh engagement, and pressure loss caused by a worn accumulator piston
• Durable construction resists cracking and deformation under repeated thermal cycling
• Ideal for rebuilders and technicians performing valve body or transmission repairs

Compatibility

This Sonnax accumulator piston kit is compatible with Chevrolet/GM vehicles equipped with 6T30 (Gen 2), 6T31 (Gen 3 6T40), 6T35 (Gen 3 6T40), 6T40 (Gen 2), 6T41 (Gen 3 6T40), 6T46 (Gen 3 6T40), and 6T51 (Gen 3 6T40) transmissions. Please verify your transmission code before ordering.

Why Choose This Part?

When a failing accumulator piston disrupts line pressure, drivability and transmission longevity suffer. This Sonnax kit provides a proven fix trusted by transmission professionals. Ensure smooth, consistent shifts and extend the life of your GM 6T transmission. Order now and get fast shipping from Florida.