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.

4R70E, 4R70W, 4R75E, 4R75W, AODE

Main Pressure Regulator Valve
Part No. 76948-09

Fits '96-later units.

You need this if... View Instructions Find a Distributor

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
Learn More About Zip Valve™ Drop-In Repairs

'91–'95 PR valve and '96-later PR valve designs are not interchangeable. For '91–'95 PR valve, see 76948-01.

  • 4R70E, 4R70W, 4R75E, 4R75W, AODE Main Pressure Regulator Valve 76948-09
  • 4R70E, 4R70W, 4R75E, 4R75W, AODE Main Pressure Regulator Valve 76948-09
  • 4R70E, 4R70W, 4R75E, 4R75W, AODE Main Pressure Regulator Valve 76948-09 details

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

4R70E, 4R70W, 4R75E, 4R75W, AODE Main Pressure Regulator Valve Vacuum Test Locations