Symptoms:

  • Soft shifts
  • Low line rise in Drive
  • High line pressure in Reverse

Cause:

These problems can be caused by severe wear of the boost valve sleeve, allowing EPC and reverse oil leakage.

Correction:

The Sonnax boost valve kit has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.

U140E, U140F, U240E, U241E

Boost Valve Kit
Part No. 57917E-01K

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

Toyota/Lexus vehicles with U140E, U140F, U240E and U241E transmissions may exhibit insufficient line rise in the drive ranges and excessively high pressures in Reverse. This may be caused by continuous oscillation of the steel boost valve within the cast-aluminum sleeve, creating excessive wear and a path for EPC and Reverse pressures to leak. Sonnax boost valve kit 57917E-01K has upgraded materials to prevent wear and to restore proper hydraulic control.

  • Boost sleeve manufactured from highly wear-resistant billet aluminum to prevent the excessive wear exhibited by the cast OE sleeve
  • Restores proper line rise
  • Valve
  • Sleeve
  • 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 U140E/F, U240E, U241E Valve Body Layout

Toyota U140E/F, U240E, U241E Valve Body Layout
  • U140E, U140F, U240E, U241E Boost Valve Kit 57917E-01K
  • U140E, U140F, U240E, U241E Boost Valve Kit 57917E-01K
  • U140E, U140F, U240E, U241E Boost Valve Kit 57917E-01K details

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.

U140E, U140F, U240E, U241E Boost Valve Kit Vacuum Test Locations