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  • Lube failures
  • Burnt converter
  • Harsh lockup
  • TCC apply & release concerns


Severe wear of the valve and bore allowing EPC and/or balance pressure loss.


The Sonnax secondary pressure regulator valve repair kit with upgraded materials and minimal clearances prevent wear and restore proper hydraulic function.

U140E, U140F, U151E, U151F, U240E, U241E, U250E

Oversized Secondary Pressure Regulator Valve Kit
Part No. 57917E-16K

View Instructions

The continuous oscillation of the secondary regulator valve wears the valve spools and valve body bore at the contacting surfaces. Such wear results in TCC pressure irregularities and valve instability. If pressure is high, harsh lock-up clutch engagement can result. If the pressure is too low, the TC clutch cannot achieve complete lock-up. Continuous clutch slippage will lead to burned clutch material and converter. Under these conditions loss of mileage and poor drive-ability are to be expected.

  • Oversized hard-coat anodized valve is manufactured to highly precise tolerance to resist wear.
  • The oversized valve and included matched spring restore OEM regulated pressure specifications.
  • Kit allows salvage of previously non-repairable valve bodies and avoids searching for, and purchase of, expensive replacement valve bodies.
  • Valve
  • Spring
  • End Plug

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 U151E/F, U250E Valve Body Layout

Toyota u151ef  u250e

Toyota U140E/F, U240E, U241E Valve Body Layout

U140ef vbl thumb

January 21, 2013

Toyota U151E/F, U250E Vacuum Test Guide

Topics: Vacuum Testing Vacuum Test Guides Transmission Toyota/Lexus U250E Transmission U151F Transmission U151E Transmission

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December 21, 2012

Toyota U140E/F, U240E, U241E Vacuum Test Guide

Topics: Vacuum Testing Vacuum Test Guides Transmission Toyota/Lexus U241E Transmission U240E Transmission U140F Transmission U140E Transmission

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  • 57917e 16k combo
  • 57917e 16k