4R100 Overdrive Servo Piston Bonded 1989-2004

Overview

This is a servo piston assembly and apply kit for the Ford, Lincoln, Mercury 4R100 automatic transmission. 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. 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

Quality & Service

In-stock parts ship fast; special-order items ship within 3 business days. Free shipping on orders over $70 to the lower 48 states. Backed by Core Transmission Parts — your source for 4R100 transmission parts.