4R100 Servo Piston Kit 1989-Up

Overview

This is a servo piston assembly and apply kit for the Ford, Lincoln, Mercury 4R100 automatic transmission (1989-Up). Built to OEM specification and engineered as a direct-fit replacement for a professional-grade 4R100 repair or rebuild. Every 4R100 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 4R100 automatic transmission, 1989-Up. Please confirm your transmission model and year before ordering to ensure correct fitment.

Common Symptoms & When to Use

Consider this 4R100 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: 4R100
• Year Range: 1989-Up

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 4R100 transmission parts.