Symptoms:

  • TCC apply & release concerns
  • TCC slip codes
  • Burnt converter
  • Overheated fluid

Cause:

Wear at the lockup control boost valve and sleeve can allow the converter control valve to stroke to the apply position prematurely, resulting in converter apply/release complaints, slip codes, overheated fluid or a burned converter.

Correction:

This Sonnax lockup control boost valve  kit has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.

U660E, U660F, U760E, U760F

Lockup Control Boost Valve Kit
Part No. 47740-06K

You need this if... View Instructions Find a Distributor

Vehicles with Toyota/Lexus U660E/F, U760E/F transmissions may exhibit converter apply/release complaints, slip codes, overheated fluid or a burned converter. These problems may be caused by continuous oscillation of the steel lockup control boost valve within the cast aluminum boost sleeve, creating excessive wear and a path for converter/cooler fluid to exhaust and the lockup control valve to stroke prematurely.

Sonnax lockup control boost valve kit 47740-06K has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.

  • Boost sleeve is manufactured from highly wear-resistant billet aluminum to prevent excessive wear
  • Restores proper line rise
  • Valve
  • Sleeve

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 U660E/F, U760E/F Valve Body Layout

Toyota U660E/F, U760E/F Valve Body Layout
  • U660E, U660F, U760E, U760F Lockup Control Boost Valve Kit 47740-06K
  • U660E, U660F, U760E, U760F Lockup Control Boost Valve Kit 47740-06K

You need this if...

A vacuum test at the port indicated fails to hold at least 18 in-Hg.

U660E, U660F, U760E, U760F Lockup Control Boost Valve Kit Vacuum Test Locations