Symptoms:

  • Inconsistent shift quality
  • Flare shifts
  • Clutch failure
  • Bump shifts
  • Bang shifts
  • Shift codes

Cause:

Wear at the various end plugs allows critical circuit leakage of solenoid modulator, secondary regulator, and line pressures. These pressure losses impair control of the clutches, resulting in various shift complaints and eventual failure.

Correction:

Install the Sonnax O-ringed end plugs to prevent oil pressure loss at the plugs.

U151E, U151F, U250E

O-Ringed End Plug Kit
Part No. 27741-20K

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Wear at the various OE end plugs in Toyota U151E/F, U250E units allows critical circuit leakage of solenoid modulator, secondary regulator and line pressures. These pressure losses impair control of the clutches, resulting in various shift complaints and eventual failure. The Sonnax O-ringed end plug kit 27741-20K contains all of the circuit sealing end plugs required to prevent this critical oil pressure loss.

  • End plugs install quickly with no reaming required
  • Kit contains all of the circuit sealing end plugs required for the complete valve body
  • End Plugs (4) 11mm dia.
  • O-Rings, Small (6) 2 extra
  • End Plugs 12mm dia.
  • O-Rings, Medium (2) 1 extra
  • End Plugs (5) 13mm dia.
  • O-Rings, Large (7) 2 extra

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/Lexus U151E/F, U250E Valve Body Layout

Toyota/Lexus U151E/F, U250E Valve Body Layout
  • U151E, U151F, U250E O-Ringed End Plug Kit 27741-20K