Product Description
Tooling Required
U760E U760F Oversized B1 Apply Control Valve Kit
In Toyota/Lexus U760E/F transmissions, the B1 brake clutch is applied in 2nd and 6th Gears. The B1 apply control valve redirects line pressure to the brake clutch. Wear at the valve and/or boost valve and sleeve can cause improper valve function, and in extreme cases, reduction in line pressure. Reconditioning the bore and installing Sonnax oversized B1 apply control valve kit 47740-44K will control line pressure losses and restore valve function.
- Sleeve manufactured from highly wear-resistant aluminum
- Hardcoat anodized aluminum valves combat premature wear
- Annular grooves help center valve to reduce side-load wear
- Properly calibrated spring to match OE pressures
Symptoms
- 1-2 Long slide
- B1 Clutches burned
- Clutch failure
- Low line pressure
Cause
Wear at the B1 apply control valve or boost valve/sleeve can cause improper function of the B1 apply control valve, leading to incorrect clutch pressure. Line pressure acts in multiple locations at this valve, so excessive wear can lower line pressure.
Correction
Recondition the bore and installing Sonnax oversized B1 apply control valve kit reduces line pressure losses and restores proper function of the B1 apply control valve, restoring proper clutch pressure.
Contents
- B1 Apply Control Valve
- Spring
- Boost Valve
- Boost Sleeve
