5R55N/W/S Overdrive Servo Cover fits Ford 99-Up

Genuine Ford 5R55N/W/S Overdrive Servo Cover with 2-Lip Seal Piston – Compatible for 1999-Up

Stop harsh 3-4 & 4-5 shifts, delayed band apply, and burnt overdrive bands with this upgraded overdrive servo cover.

This Genuine Ford direct-replacement servo cover includes the improved 2-lip seal piston design (use with 56528A) for the 5R55N, 5R55W, and 5R55S transmissions. The factory cover and piston commonly warp, crack, or leak under heat and mileage, causing weak apply pressure — leading to slip in higher gears, harsh engagement, and rapid band failure. This precision-machined aluminum cover with bonded 2-lip seal restores firm servo operation, delivers smooth and reliable upshifts, and protects your overdrive band for long-term performance.

Perfect fit for popular models including:

• Ford Explorer, Sport Trac, Mustang
• Mercury Mountaineer
• Lincoln Aviator, LS
• Ford Thunderbird

Symptoms of a failing overdrive servo cover/piston:

• Harsh or delayed 3-4 or 4-5 upshift
• Slipping or no overdrive engagement
• Burnt overdrive band on teardown
• Servo cover leakage or low pressure

Don’t risk another rebuild on a worn servo cover — install the upgraded cover and piston and shift crisp every time.

Add this essential 5R55N/W/S rebuild part to your cart today and keep higher gears strong!