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Symptoms:

  • Overheated fluid
  • RPM surge on coast
  • Harsh downshifts
  • TCC apply & release concerns
  • TCC codes

Cause:

Wear at the lockup control valve results in the converter remaining applied and transferring shift shock. Loss of lube pressure and control timing also results in RPM fluctuation.

Correction:

The Sonnax oversized lockup control plunger valve and sleeve kit corrects lost lube pressure and control timing issues caused by a worn OE plunger valve and sleeve.

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

Oversized Lockup Control Valve Kit
Part No. 147741-16K


You need this if... View Instructions

Toyota/Lexus A750, A760 and A960 series transmissions can have harsh 2-3 and harsh coast downshift complaints associated with bore wear at the lockup control valve. This is due to the converter clutch remaning applied. When bore wear delays TCC apply, the vehicle RPM may surge or set gear ratio codes due to high slip rates. Installing the Sonnax oversized lockup control valve, plunger valve and sleeve kit 147741-16K can restore correct lube pressure and valve control timing.

  • Restores correct lube pressure
  • Re-establishes valve control timing
  • Lockup Control Valve
  • Plunger Valve
  • Plunger 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 A760E/F/H Series Valve Body Layout

A760e f h vbl thumb

Toyota A750E/F Series Valve Body Layout

A750e f vbl thumb

January 16, 2014

Toyota A750E-A761E Identification Guide

Topics: Identification Guides Transmission Toyota/Lexus A760H Transmission AB60E Transmission AB60F Transmission A761E Transmission A750F Transmission A760E Transmission A750E Transmission A760F Transmission

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December 03, 2013

Toyota A750E/F, A760E/F/H, A761E Vacuum Test Guide

Topics: Vacuum Test Guides Vacuum Testing Transmission Toyota/Lexus A760H Transmission A761E Transmission A750F Transmission A760E Transmission A750E Transmission A760F Transmission

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  • 147741 16k combo
  • 147741 16k  1

You need this if...

A vacuum test at any port indicated fails to hold the recommended in-Hg of vacuum or higher, or if visual wear is detected.

  • 147741 16k

Instructions