Some vehicles equipped with an Toyota/Lexus A340 series transmissions may exhibit complaints of no converter apply, overheated converters, lack of cooler flow and/or transmission fluid overheating. A worn lockup relay valve sleeve due to continuous oscillation of the lockup relay valves can cause these complaints. Wear in the 1st land (see illustration) may cause a loss of Solenoid 3 signal pressure, which may prevent the valve from stroking fully into the TCC apply position. When the TCC is signaled ON, wear at the 2nd and/or 3rd lands may allow converter apply pressure to leak to exhaust, creating reduced apply pressure and cooler flow.

The Sonnax lockup relay valve sleeve kit 97855-27K provides two drop-in-place sleeves that are sized to reuse the OE valves. These sleeves are made from highly wear-resistant billet aluminum, which provides a much longer wear life then the OE cast-aluminum sleeve. The Sonnax sleeves also provide almost 50% more support for the valves, which helps reduce wear and hydraulic leakage. This sleeve kit allows the salvage of an expensive valve body, and provides increased durability compared to the OE design.

• Highly wear-resistant billet aluminum sleeves for increased durability
• Almost 50% more support for valves to aid in leakage prevention
• Kit allows salvage of expensive valve bodies
• Drop-in Zip Valve™ parts install quickly and easily