4R55E Servo Piston Kit

Overview

This is a servo piston assembly and apply kit for the Ford, Lincoln, Mercury 4R55E automatic transmission. Built to OEM specification and engineered as a direct-fit replacement for a professional-grade 4R55E repair or rebuild. Every 4R55E order ships fast and is backed by our support team.

What's Included

• a larger-apply servo piston assembly
• cover, snap ring and seals as applicable
• an apply pin where supplied with the kit

Fitment

Fits Ford, Lincoln, Mercury vehicles equipped with the 4R55E automatic transmission. Please confirm your transmission model and year before ordering to ensure correct fitment.

Common Symptoms & When to Use

Consider this 4R55E part when you experience:

• a slipping or burnt 2-4 band
• soft or flared 1-2 and 3-4 shifts
• weak band apply under load or towing
• a servo bore or seal leak found during rebuild

Specifications

• Transmission: 4R55E

Quality & Service

In-stock parts ship fast; special-order items ship within 3 business days. Free shipping on orders over $70. Backed by Core Transmission Parts — your source for 4R55E transmission parts.