Symptoms:

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

Cause:

A worn lockup relay valve bore can limit fluid to the cooler as well as reduce converter pressure.

Correction:

Recover hydraulic control and renew TCC and cooler performance by reconditioning the bore and installing Sonnax oversized lockup relay valve kit.

A245E, A246E, A340E, A340F, A650E

Oversized Lockup Relay Valve Kit
Part No. 97741-20K

Fits A340E/F '00-later, type 3 and 4 valve bodies. 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

Listed Toyota transmissions have lockup relay valves that route converter feed fluid pressure to the release side of the converter clutch and apply fluid into the cooler fluid circuit. Converter feed pressure at the lockup relay control plunger valve helps in proper positioning of the inboard lockup relay valve. Wear at these valves can result in converter apply and release concerns, inadequate lubrication, overheated fluid, bushing and solenoid failure, as well as converter codes. The Sonnax oversized lockup relay valve kit 97741-20K restores the proper hydraulic clearance to re-establish OE function and performance.

  • For A245E, A246E applications, this part only fits '05-later units with casting code 9132 on the upper valve body.
  • Valves are hardcoat anodized to reduce wear
  • Sleeve redesign eliminates rotational indexing issues and provides 360° flow around the valve which prevents side loading
  • Sleeve redesign incorporates grooves and cross-slots to maximize valve support while maintaining proper flow
  • Plunger Valve
  • Plunger Sleeve
  • Lockup Relay Valve

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
  • A245E, A246E, A340E, A340F, A650E Oversized Lockup Relay Valve Kit 97741-20K
  • A245E, A246E, A340E, A340F, A650E Oversized Lockup Relay Valve Kit 97741-20K
  • A245E, A246E, A340E, A340F, A650E Oversized Lockup Relay Valve Kit 97741-20K 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.

A245E, A246E, A340E, A340F, A650E Oversized Lockup Relay Valve Kit Vacuum Test Locations
A245E, A246E, A340E, A340F, A650E Oversized Lockup Relay Valve Kit Vacuum Test Locations
A245E, A246E, A340E, A340F, A650E Oversized Lockup Relay Valve Kit Vacuum Test Locations