December 09, 2013
Symptoms:
- Delayed Reverse
- Harsh Reverse
- Double bump Reverse engagement
- No Manual 1st
- B2 Clutches burned
Cause:
Bore wear at the B2 control valve allows B2 clutch control pressure loss, resulting in reverse engagement issues. When this wear becomes severe enough, the plug valve can stick, causing loss of Reverse.Correction:
Recover hydraulic control and renew reverse performance by reconditioning the bore and installing Sonnax oversized B2 control valve kit.U660E, U660F, U760E, U760F
Oversized B2 Control Valve Kit
Part No. 47740-35K
-
Tooling:
- F-47740-TL35
- VB-FIX
You need this if... View Instructions Find a Distributor
Vehicles equipped with Toyota/Lexus U660E/F or U760E/F transmissions may exhibit problems related to the B2 brake clutch. These include a delayed or harsh reverse engagement or a double bump when the B3 brake clutch applies before the B2 brake clutch.
These concerns can be traced to a worn and/or sticking B2 control valve and plug valve. Sonnax offers oversized B2 control valve kit 47740-35K, which renews valve function to restore normal Reverse operation.
- Hardcoat anodized aluminum valve combats premature wear
- Annular grooves on the valves help center them in the bore to reduce future side-load wear
- Spring calibrated to match OE pressures
- B2 Control Valve
- Plug Valve
- Spring
- 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
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