Description
4R70E / 4R70W / 4R75E / 4R75W / AODE Main Pressure Regulator Valve, Sonnax 76948-09.
Fits ’96-later units.
Vehicles with Ford 4R70E, 4R70W, 4R75E, 4R75W 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 drivability concerns. Worn pressure regulator valve spools allowing pressure escape are a common problem in these units. Installing Sonnax main pressure regulator valve 76948-09 restores normal line pressure operation in all ranges.
If bore is excessively worn, install Sonnax oversized pressure regulator and boost valve kit 76948-17K. Sonnax valve replaces both styles of OE valve found in ’96-later units.
- Hardcoat anodized aluminum valve combats premature wear
- Annular grooves help center valve in bore to reduce side-loading
- Drop-in Zip Valve™ parts install quickly and easily
’91–’95 PR valve and ’96-later PR valve designs are not interchangeable. For ’91–’95 PR valve, see 76948-01.
Symptoms:
- Poor shift quality
- Soft shifts
- Low line rise
- Erratic buzz
- Premature clutch failure
- Premature band failure
- Low Reverse boost
- Uncontrolled pressure in Reverse
Cause:
Regulator valve wear allows critical fluid loss that results in drivability concerns.
Correction:
Renew pressure regulator performance and revive line pressure control by installing Sonnax drop-in main pressure regulator valve.
