Symptoms:

  • Harsh downshifts
  • Neutral shifts
  • High line pressure
  • Harsh upshifts
  • Wrong gear starts
  • Gear ratio & solenoid codes
  • TCC slip
  • Flare shifts
  • Delayed engagement

Cause:

All solenoids are fed by the solenoid pressure regulator valve. Worn valve/bore surfaces allow critical pressurized oil to cross-leak to the sump, reducing available oil pressure and volume for the solenoids. Shift quality will be adversely affected by wear and operating temperatures.

Correction:

Sonnax oversized solenoid pressure regulator valve kit eliminates cross-leaks and loss of critical oil to the sump, restoring correct oil pressure and volume available to the solenoids.

948TE, Honda, Acura 9-Speed, ZF9HP48

Oversized Solenoid Pressure Regulator Valve Kit
Part No. 85740-11K


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

Chrysler 948TE, Honda/Acura, 9-speed and ZF9HP48 transmissions incorporate variable force solenoids to control clutch apply/release, torque converter clutch apply/release and line pressure. The solenoid pressure regulator valve insures proper flow volume and pressure to the solenoids during hot conditions and low pressure operation. Low feed pressure at idle can create delayed engagement or wrong gear starts. This valve also limits the maximum pressure to all the solenoids. Excessive solenoid feed pressure can flood the solenoids causing gear ratio codes, harsh up/downshifts and excessive line pressure. Reconditioning the bore and installing Sonnax oversized solenoid pressure regulator valve kit 85740-11K restores proper solenoid pressure regulation.

  • Hardcoat anodized aluminum valve combats premature wear
  • Maximized valve support to prevent side-load wear and cross-leaks
  • Matching spring reproduces OE function with the oversized valve
  • Valve
  • Spring
  • End Plug
  • 948TE, Honda, Acura 9-Speed, ZF9HP48 Oversized Solenoid Pressure Regulator Valve Kit 85740-11K
  • 948TE, Honda, Acura 9-Speed, ZF9HP48 Oversized Solenoid Pressure Regulator Valve Kit 85740-11K

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.

948TE, Honda, Acura 9-Speed, ZF9HP48 Oversized Solenoid Pressure Regulator Valve Kit Vacuum Test Locations