Tool Required VB-FIX Required
- Harsh downshifts
- RPM fluctuation
- TCC apply & release concerns
- TCC slip codes
Wear at the lockup control valve bore and plunger/sleeve assembly results in loss of hydraulic control, creating TCC engagement and timing issues.
Recover hydraulic control and renew TCC performance by reconditioning bore and installing Sonnax oversized lockup control valve kit.
Oversized Lockup Control Valve Kit
- Control Valve
- Plunger Valve
- Plunger Sleeve
Toyota/Lexus vehicles equipped with U760E and U760F transmissions often exhibit several common concerns related to wear in the lockup control valve bore. Oscillation of the lockup control valve and stroking of the plunger valve in its sleeve results in wear that prevents full hydraulic control of the lockup circuit. TCC slip, RPM surge, harsh downshifts and/or slip codes can accompany the TCC apply/release concerns that develop in these cases. Sonnax oversized lockup control valve kit 47740-31K allows the bore to be refurbished, restoring normal TCC operation.
- Hardcoat anodized aluminum valves combat premature wear
- Annular grooves help center valves in bore and sleeve to reduce future side-load wear