Symptoms:
- 2nd & 6th Gear shift concerns
- B1 Clutches burned
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.Correction:
Reconditioning the bore and installing the Sonnax oversized B1 apply control valve kit will restore proper function of the B1 apply control valve, restoring proper clutch function.U660E, U660F
Oversized B1 Apply Control Valve Kit
Part No. 47740-57K
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Tooling:
- F-47740-TL57
- VB-FIX
You need this if... View Instructions Find a Distributor
Vehicles with Toyota/Lexus U660E and U660F transmissions may exhibit 2nd and 6th Gear shift complaints and burnt B1 clutches. This can be caused by wear at the valve and/or boost valve and sleeve which leads to improper valve function. Reconditioning the bore and installing the Sonnax oversized B1 apply control valve kit 47740-57K will 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
- Valve designed to reuse OE spring
- B1 Apply Control Valve
- Boost Sleeve
- Boost Valve
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.
Related Sonnax Parts
Required
Recommended
U660E, U660F
Oversized B1 Apply Control Valve Kit 47740-57K
-
Helps cure:
- 2nd & 6th Gear shift concerns
- B1 Clutches burned