76788K - LOCK UP RELAY CONTROL O/S VALVE KIT

# 76788K

LOCK UP RELAY CONTROL O/S VALVE KIT

* Reamer Required

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.

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.

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 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

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