Tool Required

Printpartsummary
Symptoms:
  • Clutch & band failures
  • Harsh shifts
  • High line pressure
  • High line pressure in Reverse
  • Low converter pressure
  • Low line pressure
  • Soft shifts
Cause:

Continuous oscillation of the pressure regulator valve causes valve body bore wear, which results in line pressure irregularities and valve instability. Severe wear of the boost valve sleeve allows EPC and reverse oil leakage.

Correction:

This oversized pressure regulator valve and boost assembly allows the valve body bore to be restored to normal operating condition.

Tool Required

U140E, U140F, U240E, U241E

Oversized Pressure Regulator & Boost Valve Kit

Part No.

57917E-08K

Oversized Pressure Regulator & Boost Valve Kit
  • 57917e-08k_combo

  • Oversized Pressure Regulator & Boost Valve Kit

Small_57917e-08k_combo Small_57917e-08k

U140E, U140F, U240E, U241E

Oversized Pressure Regulator & Boost Valve Kit

Part No. 57917E-08K

  • Pressure Regulator Valve
  • Pressure Regulator Spring
  • Boost Valve
  • Boost Sleeve
  • Boost Valve Plug

Complaint:

  • Clutch & band failures
  • Harsh shifts
  • High line pressure
  • High line pressure in Reverse
  • Low converter pressure
  • Low line pressure
  • Soft shifts

Cause:

Continuous oscillation of the pressure regulator valve causes valve body bore wear, which results in line pressure irregularities and valve instability. Severe wear of the boost valve sleeve allows EPC and reverse oil leakage.


Correction:

This oversized pressure regulator valve and boost assembly allows the valve body bore to be restored to normal operating condition.

  • Oversized, hard-coat anodized valves are manufactured to extremely tight tolerances and resist wear.
  • A new spring is included to work with the oversized valve and re-establish OE regulated pressure specifications.
  • Kit includes an increased ratio boost valve assembly specially designed to work with the oversized regulator valve.

Required Tools

Related Parts

You need this if...

Excessive leakage is found at either of the two locations shown

  • 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 U140E/F, U240E, U241E

Related Tech Articles

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