Tool Required VB-FIX Required

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

Tool Required VB-FIX Required

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

Oversized Lockup Relay Valve Kit

Part No.

147741-07K

Oversized Lockup Relay Valve Kit
  • 147741-07k

  • Oversized Lockup Relay Valve Kit

Small_147741-07k Small_147741-07k__1_

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

Oversized Lockup Relay Valve Kit

Part No. 147741-07K

  • Lockup Relay Valve
  • Control Valve
  • Spring
  • End Plug

Complaint:

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

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.

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

Required Tools

Related Parts

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.

  • Test Locations
  • Test Locations

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Valve Body Layouts

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.

Valve Body Layout Toyota A760E/F/H Series
Valve Body Layout Toyota A750E/F Series

Related Tech Articles

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