Piston / Servo Overdrive 5R55N / 5R55W / 5R55S (2.915") (blue) (oem# 4w4z-7d021-a)

Piston / Servo Overdrive for 5R55N / 5R55W / 5R55S Transmissions | Various Brands | Atk

Restore proper overdrive servo operation in your 5R55N, 5R55W, or 5R55S transmission with this high-quality overdrive servo piston. Manufactured by Atk, this blue anodized piston measures 2.915 inches and directly replaces OEM part number 4W4Z-7D021-A, delivering reliable performance for your rebuild or repair.

Key Features

• Direct replacement for OEM part number 4W4Z-7D021-A
• Precision 2.915-inch diameter for exact fitment
• Blue anodized finish for durability and corrosion resistance
• Manufactured by Atk to meet or exceed OE specifications
• Engineered specifically for 5R55N, 5R55W, and 5R55S overdrive servo circuits

Compatibility

This overdrive servo piston is compatible with Various brand vehicles equipped with the 5R55N, 5R55S, and 5R55W automatic transmissions. Years of coverage are not specified; please verify your transmission code and OEM part number before ordering.

Why Choose This Part?

When your overdrive servo fails, you need a piston that fits right and performs reliably. This Atk-manufactured piston offers OEM-level quality at a competitive price, making it an ideal choice for transmission rebuilders and repair shops. Verify your application and order today to get your 5R55N, 5R55W, or 5R55S transmission shifting smoothly again.