Symptoms:

  • TCC apply & release concerns
  • TCC codes
  • RPM fluctuation
  • Inadequate lubrication
  • Bushing failure
  • Overheated fluid

Cause:

Wear at the lockup relay control valve sleeve results in loss of hydraulic control of TCC circuit.

Correction:

Recover hydraulic control and renew TCC performance by installing Sonnax lockup relay control valve kit.

81-40LE, A245E, A246E, A340E, A340F, A650E

Lockup Relay Control Valve Kit
Part No. 77741-02K

For A245E, A246E applications, this part only fits '05-later units with casting code 9132 on the upper valve body.

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

Excess wear at the lockup relay control sleeve in Aisin AW and Toyota/Lexus units with casting code 9132 prevents proper TCC operation and can result in various adverse symptoms. TCC apply and release concerns often develop, coupled with overheated fluid, inadequate lubrication, bushing and solenoid failure, RPM fluctuation, and converter codes. Installing Sonnax lockup relay control valve kit 77741-02K restores critical hydraulic clearances, allowing renewed TCC and lube operation.

  • Sleeve manufactured from highly wear-resistant billet aluminum
  • Sleeve design incorporates grooves and cross-slots to maximize valve support while maintaining proper flow
  • Hardcoat anodized valve combats premature wear
  • 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/Lexus A340, A340E/F/H Valve Body Layout

Toyota/Lexus A340, A340E/F/H Valve Body Layout
  • 81-40LE, A245E, A246E, A340E, A340F, A650E Lockup Relay Control Valve Kit 77741-02K
  • 81-40LE, A245E, A246E, A340E, A340F, A650E Lockup Relay Control Valve Kit 77741-02K
  • 81-40LE, A245E, A246E, A340E, A340F, A650E Lockup Relay Control Valve Kit 77741-02K
  • 81-40LE, A245E, A246E, A340E, A340F, A650E Lockup Relay Control Valve Kit 77741-02K
  • 81-40LE, A245E, A246E, A340E, A340F, A650E Lockup Relay Control Valve Kit 77741-02K
  • 81-40LE, A245E, A246E, A340E, A340F, A650E Lockup Relay Control Valve Kit 77741-02K details

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.

81-40LE, A245E, A246E, A340E, A340F, A650E Lockup Relay Control Valve Kit Vacuum Test Locations