Product Description
Fits: 4R70W, AODE
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
Notes
'91–'95 PR valve and '96-later PR valve designs are not interchangeable. For '96-later PR valve, see 76948-09.
Valve Body Layout
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
Ford AODE, 4R70W, 4R75W, 4R70E, 4R75E Valve Body Layout
Symptoms
- Poor shift quality
- Soft shifts
- Low line rise
- Erratic buzz
- Premature clutch failure
- Premature band failure
- Uncontrolled pressure in Reverse
- Low Reverse boost
Cause
Regulator valve wear allows critical fluid loss that results in driveability concerns.
Correction
Renew pressure regulator performance and revive line pressure control by installing Sonnax main pressure regulator valve.
