AODE/4R70W Upgraded Servo Piston w/ Sonnax Pin for Ford (96-Up)

Enhance your Ford vehicle's transmission performance with this upgraded remanufactured overdrive servo piston bundle, compatible with AODE/4R70W transmissions in models from 1996 and up.

This bundle includes a high-quality reman piston paired with a Sonnax O-ring pin designed to eliminate common pressure leaks and improve shifting reliability. Ideal for addressing issues like erratic shifts, neutral drops during upshifts, and premature wear on bands and clutches, this upgrade ensures smoother operation and extended durability under demanding conditions. Perfect for DIY repairs or professional installs, it restores optimal hydraulic pressure for better engagement and prevents costly failures in high-mileage vehicles. All parts are distributed, not designed, by Stellar Automotive Group.

In AODE transmissions, common problems are intermediate roller clutch, overdrive band or forward clutch failure, traced to the O.D. servo pin wearing the case bore. The oil circuit which releases or holds the servo off is present as forward clutch oil in 1, 2, 3 ranges. If this release oil leaks through the case, it can cause the O.D. band to drag and/or forward clutches to overheat. If band overheating becomes extensive, it may not hold in 4th gear, which can allow a neutral condition and excessive roller RPM on a re-engagement of 4-2 downshift.

• Upgraded Overdrive Servo Piston Bundle compatible with Ford AODE/4R70W transmissions for vehicles 1996 and up, including F-150, Mustang, Explorer, Crown Victoria, Thunderbird, Lincoln Town Car, Mercury Grand Marquis, and more
• Includes Sonnax O-ring pin with dual seals to prevent oil leaks between the pin, piston, and case bore, fixing common wear issues that reduce apply force
• Resolves shifting problems like 2-3 or 4-3 neutrals, overdrive band burnout, forward clutch slippage, and related diagnostic codes for reliable performance
• Remanufactured for superior quality and fit, outperforming stock components by maintaining consistent pressure and reducing transmission heat buildup
• Easy installation with no special tools required, suitable for bench or in-vehicle service, helping avoid expensive full rebuilds in high-torque applications

**Product comes fully assembled. The right side of the product image shows parts included.