Intermediate & Overdrive Servo Piston for Ford1997-Up

Premium Molded Intermediate & Overdrive Servo Piston

Upgrade or rebuild your Ford transmission with this high-performance molded servo piston. Designed as a direct replacement for OEM F77Z-7D021-ZA, this 2.314" ID piston fits C-3, A4LD, 4R44E, 4R55E and 5R55E transmissions found in popular Ford and Mercury vehicles from 1997 and up.

The molded one-piece construction provides exceptional durability and reliable sealing compared to original equipment pistons that are prone to cracking and leaking. It restores proper band apply pressure for the intermediate and overdrive servos, eliminating common shifting complaints such as harsh engagement, flare on upshifts, slipping and delayed response.

Vehicle Fitment (partial list): 1997-2011 Ford Ranger 1997-2001 Ford Explorer 2001-2005 Ford Explorer Sport Trac 1998-2001 Mercury Mountaineer 1997 Ford Aerostar (Mazda B-Series equivalents also apply)

Benefits: • Precise fit with 2.314" inner diameter and ZC cover designation • Eliminates leaks and pressure loss in servo bores • Improves shift quality and extends transmission life • Easy drop-in installation – no special tools required

Whether you are performing a full transmission rebuild or addressing shifting issues, this servo piston delivers factory-correct performance you can trust.