Symptoms:

  • TCC apply & release concerns
  • Harsh downshifts
  • RPM fluctuation
  • 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, A761E, A960E, A960F

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


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

Toyota/Lexus A750, A761 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 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

Toyota A760E/F/H Series Valve Body Layout

Toyota/Lexus A750E/F Valve Body Layout

Toyota/Lexus A750E/F Valve Body Layout
  • A750E, A750F, A761E, A960E, A960F Oversized Lockup Control Valve Kit 147741-16K
  • A750E, A750F, A761E, A960E, A960F Oversized Lockup Control Valve Kit 147741-16K

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.

A750E, A750F, A761E, A960E, A960F Oversized Lockup Control Valve Kit Vacuum Test Locations
A750E, A750F, A761E, A960E, A960F Oversized Lockup Control Valve Kit Vacuum Test Locations