5R55S TRANSMISSION INFO AND OVERVIEW

The 5R55S represents Ford’s fully electronic, 5-speed "synchronous" automatic transmission, made famous primarily by the 2005-2010 S197 Mustang and 4.0L/4.6L Explorers. From the factory, it provides great drivability, but it is plagued by notorious hydraulic leaks and wear issues that cause shift flares and slipping. When pushed with superchargers or hard driving, the factory components quickly reach their limits. With the right aftermarket solutions and hydraulic fixes, the 5R55S can be transformed into a stout, reliable unit capable of handling aggressive street driving and boosted applications.

COMMON FAILURE POINTS (STOCK):

  • Servo Pin Bore Wear (Causes massive internal pressure leaks, shift flares, and band failure)

  • Solenoid Block Failure (Electrical shorts or sticking valves causing erratic shifting)

  • Overdrive & Intermediate Bands (Prone to breaking or burning up due to pressure loss)

  • Input Shaft (Can snap under heavy torque, especially on supercharged Mustangs)

PERFORMANCE SOLUTIONS: Through extensive testing and diagnostics, we address the root cause of Ford's factory design flaws—specifically the hydraulic leaks in the aluminum case. By machining and sleeving the servo bores and upgrading the friction materials, we restore and enhance the integrity of the transmission to hold serious power.

KEY IMPROVEMENTS:

  • Machined and sleeved servo bores to permanently restore hydraulic pressure and eliminate shift flares

  • Upgraded heavy-duty solenoid blocks for crisp, reliable electronic shifting

  • Carbon fiber or Kevlar bands for superior holding power in high-stress applications

  • Billet input shafts to eliminate twist and breakage under boosted loads

5R55S Automatic Transmission (Rebuild)

  • Ford-5R55s-e4od-rebuilt-transmissions-and-torque-converter

    Turn Key 5R55S Automatic Transmission Rebuild $3,550 Starting Price

    The Flagship 5R55S Performance Package Built to handle aggressive driving, heavy towing, or added horsepower while completely eliminating Ford's notorious factory flaws. This comprehensive, turn-key service includes professional removal, custom rebuilding, complete vehicle integration, and rigorous diagnostic testing.

    Inside the Build:

    • Sleeved Servo Bores: We bore and sleeve the factory aluminum case to permanently fix the internal pressure leaks that destroy the overdrive and intermediate bands.

    • Upgraded Solenoid Block: A completely new or remanufactured heavy-duty solenoid block assembly to guarantee flawless electronic operation.

    • High-Energy Bands & Clutches: Upgraded carbon or Kevlar bands paired with high-capacity clutch packs to prevent burn-up under heavy load.

    • Performance Converter: Heavy-duty remanufactured or custom-stalled billet torque converter built specifically for your application.

    The Service Package Includes: Professional removal and installation. Premium synthetic fluid and all necessary build components. 12,000-mile check-up and pan inspection.

    Don't settle for a factory rebuild that ignores the root problems. Our flagship 5R55S Performance Package is built to take a beating. We eliminate the notorious factory weak points by permanently sleeving the case, installing an upgraded solenoid block, and packing the unit with heavy-duty bands and frictions. This is a complete, turn-key package: we handle the professional removal, custom bench build, heavy-duty torque converter pairing, and installation using premium synthetic fluids (Mercon V / LV equivalent). After thorough diagnostic testing, you get a 12,000-mile pan inspection and our full 24-month/24,000-mile warranty covering all parts, fluids, and labor. Built for power, backed for peace of mind.

    Payment Notice: A 3.5% convenience fee is applied to all credit card transactions.

    TURN-KEY INSTALLATION & INTEGRATION

    Your final installation invoice will reflect the following additions where applicable: Custom Converter, High-Performance Upgrades, Premium Fluids, and applicable NC Taxes.

    AVAILABLE BUILD UPGRADES

    • OEM-Spec Torque Converter: Reliable, factory-level power transfer.

    • Case Sleeving Service: Essential for any 5R55S build; restores factory hydraulic integrity.

    • Stage 3 Performance Package: Includes Sleeved Case, New Solenoid Block, Carbon Fiber Bands, and a Sonnax Zip Kit / valve body recalibration.

    • Stage 4 Smart-Tech Package: Includes Billet Input Shaft, Billet Overdrive/Intermediate Servos, and High-RPM clutch packs (Essential for supercharged Mustangs).

    • Custom Billet Components: Available upon request (Quote Required).

    PLATFORM COMPATIBILITY

    • Ford: Mustang (2005-2010), Explorer (2002-2010), Thunderbird

    • Mercury: Mountaineer

    • Lincoln: LS, Aviator

    SHOP TECHNICAL NOTE: The 5R55S is a "synchronous" transmission, meaning it relies on perfectly timed application of bands and clutches simultaneously to achieve a shift. If the internal case bores are worn, this timing is disrupted, resulting in the dreaded 2-3 and 3-4 shift flares (often throwing P0733 or P0775 codes). Machining and sleeving the case is mandatory for a lasting build.

    Call 704-933-8727 today or click here to schedule your vehicle drop off date