Symptoms:

  • No engine braking in D1
  • Burnt Low/Reverse clutch
  • Low/Reverse clutch distress

Cause:

Wear at the Low/Reverse modulator plunger valve sleeve bore due to continuous oscillation.

Correction:

Restore critical clearances and recover hydraulic control by installing Sonnax drop-in low/reverse modulator plunger valve kit.

4R100, E4OD

Low/Reverse Modulator Plunger Valve Kit
Part No. 36947-06K

Fits '96-later.

View Instructions Find a Distributor

In Ford 4R100 and E4OD units, the Low/Reverse modulator plunger valve uses line pressure to control the position of the Low/Reverse modulator valve. Due to continuous oscillation of the plunger valve, wear occurs at the I.D. of the sleeve, allowing line pressure to leak to exhaust. The Low/Reverse modulator valve is prevented from properly supplying regulated line pressure to the Low/Reverse clutch, which can cause slippage, burnt clutches and loss of engine braking. Sonnax Low/Reverse modulator plunger valve kit 36947-06K renews critical clearances and restores normal clutch operation.

  • Sleeve is made from highly wear-resistant aluminum
  • Hardcoat anodized aluminum valve combats premature wear
  • Drop-in Zip Valve parts install quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • Sleeve
  • Plunger Valve
  • 4R100, E4OD Low/Reverse Modulator Plunger Valve Kit 36947-06K
  • 4R100, E4OD Low/Reverse Modulator Plunger Valve Kit 36947-06K