Symptoms:

  • TCC apply & release concerns
  • TCC apply codes
  • Burnt converter
  • Shudder
  • Overheating
  • Lube failures

Cause:

Excess wear in lockup relay bore due to frequent valve stroking prevents proper hydraulic control of TCC, lube and cooler circuits.

Correction:

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

A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F

Oversized Lockup Relay Valve Kit
Part No. 147741-07K


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

Toyota vehicles equipped with listed transmissions frequently exhibit TCC and lube/cooler flow problems due to excess wear in the lockup relay valve bore. This bore deterioration allows vital fluid loss, often resulting in TCC apply and release concerns, TCC codes, lube failures, overheating, and burned TCC lining. Reconditioning the bore and installing Sonnax oversized lockup relay valve kit 147741-07K shores up the hydraulic integrity of these circuits, restoring normal TCC/cooler/lube function.

  • Hardcoat anodized aluminum valves combat premature wear
  • Matched spring helps restore OE performance
  • Control Valve
  • Spring
  • End Plug
  • 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 A760E/F/H Series Valve Body Layout

Toyota A760E/F/H Series Valve Body Layout

Toyota A750E/F Series Valve Body Layout

Toyota A750E/F Series Valve Body Layout
  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F Oversized Lockup Relay Valve Kit 147741-07K
  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F Oversized Lockup Relay Valve Kit 147741-07K

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.

  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F Oversized Lockup Relay Valve Kit Vacuum Test Locations
  • A750E, A750F, A760E, A760F, A760H, A761E, A960E, A960F, AB60E, AB60F Oversized Lockup Relay Valve Kit Vacuum Test Locations