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


Wear in the lockup control sleeve allows critical pressure loss that leads to driveability concerns.


Recover hydraulic control and renew TCC performance by installing Sonnax lockup control plunger valve kit.

A760E, A760F, A760H, AB60E, AB60F

Lockup Control Plunger Valve Kit
Part No. 157740-37K

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

Toyota/Lexus vehicles equipped with listed transmissions often exhibit TCC apply and release concerns, TCC or ratio codes, RPM surging, harsh downshifts, and overheated fluid. These problems can be caused by deterioration of the lockup control sleeve due to constant valve oscillation within the sleeve. Installing Sonnax lockup control plunger valve kit 157740-37K prevents crucial pressure escape, correcting these issues and restoring normal operation.

  • Hardcoat anodized aluminum plunger valve combats premature wear
  • Sleeve manufactured from highly wear-resistant aluminum
  • Plunger Valve
  • Sleeve

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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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  • 157740 37k combo
  • 157740 37k

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.

  • 157740 37k test