Symptoms:

  • 4-5 Harsh
  • 4-5 Flare
  • Delayed Neutral to Drive
  • Delayed Reverse

Cause:

Wear in the clutch control valve bore can create a loss of SL1 and SL2 solenoid pressures and/or loss of control over C1 and C2 clutches.  

Correction:

The oversized valve restores proper hydraulic control to ensure the correct timing of critical clutch control pressures and proper shift sequences.

U660E, U660F, U760E, U760F

Oversized Clutch Control Valve Kit
Part No. 47740-22K


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

The Toyota/Lexus U660E/F, U760E/F transmissions may exhibit harsh 4-5 upshifts/downshifts, delayed reverse or neutral to drive engagement due to wear in the clutch control valve bore. A common wear location in the bore is at the outboard spring pocket, where SL1 pressure works with the spring to keep the valve bottomed in the bore. The resulting SL1 leakage diminishes fluid pressure to the sequence valve and C1 clutch, creating delayed engagement.

Wear at the inboard bore area can allow SL2 pressure loss, resulting in diminished fluid pressure to the C2 clutch and 4-5 or 5-4 shift flares or harshness.

The Sonnax oversized clutch control valve kit 47740-22K allows the bore to be refurbished and the hydraulic integrity of the circuit to be restored.

  • Hardcoat anodized aluminum valve combats premature wear
  • Annular grooves on the valve help center it in the bore to reduce future side-load wear
  • Valve
  • End Plug

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.

Toyota/Lexus U660E/F, U760E/F Valve Body Layout

Toyota/Lexus U660E/F, U760E/F Valve Body Layout
  • U660E, U660F, U760E, U760F Oversized Clutch Control Valve Kit 47740-22K
  • U660E, U660F, U760E, U760F Oversized Clutch Control Valve Kit 47740-22K

You need this if...

A vacuum test at the port indicated fails to hold at least 16 in-Hg.

U660E, U660F, U760E, U760F Oversized Clutch Control Valve Kit Vacuum Test Locations