Ford AOD AODE Transmission Sonnax Line Pressure Modulator Plunger Valve kit Part No. 76948-01 Replaces '95-Earlier 4-spool valves only. DOES NOT replace 3-spool valves. Vehicles with 4R70W and AODE transmissions often have erratic line pressure, poor line rise and/or throttle-sensitive buzz. This can result in harsh or soft shifts and band/clutch failure as well as other driveability concerns. Worn pressure regulator valve spools allowing pressure escape are a common problem in these units. Installing Sonnax main pressure regulator valve 76948-01 restores normal line pressure operation in all ranges. If bore is excessively worn, install Sonnax oversized pressure regulator and boost valve kit 76948-16K. Hardcoat anodized aluminum valve combats premature wear Annular grooves help center valve in bore to reduce side-loading NOTE: '91–'95 PR valve and '96-later PR valve designs are not interchangeable.