Tool Required VB-FIX Required

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Symptoms:
  • Burnt converter
  • Bushing wear
  • Converter concerns
  • Lube failures
  • Overheated transmission
Cause:

Oscillation of the steel secondary pressure regulator valve within the aluminum casting causes wear, which will allow converter feed oil to leak to exhaust and not supply the lube circuit, resulting in converter complaints, burnt apply components and lube related failures.

Correction:

Restore proper hydraulic control by refurbishing the bore and replacing worn components with the oversized Sonnax valve kit.

Tool Required VB-FIX Required

A340E, A340F

Oversized Secondary Pressure Regulator Valve Kit

Part No.

97741-18K

Oversized Secondary Pressure Regulator Valve Kit
  • 97741-18k

  • Oversized Secondary Pressure Regulator Valve Kit

Small_97741-18k Small_97741-18k_combo

A340E, A340F

Oversized Secondary Pressure Regulator Valve Kit

Part No. 97741-18K

  • Valve
  • End Plug
  • O-Rings (2) 1 Extra

Fits '00-Later V6 & V8, late models, Type 3 & 4 valve bodies.

Complaint:

  • Burnt converter
  • Bushing wear
  • Converter concerns
  • Lube failures
  • Overheated transmission

Cause:

Oscillation of the steel secondary pressure regulator valve within the aluminum casting causes wear, which will allow converter feed oil to leak to exhaust and not supply the lube circuit, resulting in converter complaints, burnt apply components and lube related failures.


Correction:

Restore proper hydraulic control by refurbishing the bore and replacing worn components with the oversized Sonnax valve kit.

The secondary pressure regulator valve in Toyota A340E/F late units receives regulated line fluid pressure from the main pressure regulator valve, and routes it to the converter and lubrication circuits. The continual oscillation of the steel valve within the aluminum casting creates wear, allowing this valuable fluid pressure to exhaust, resulting in converter complaints, burnt apply components and lube-related failures. The Sonnax oversized secondary pressure regulator valve kit 97741-18K restores proper hydraulic clearance in a refurbished bore and includes an O-ringed end plug to positively seal the balance pressure circuit.

  • Valve is hardcoat anodized to reduce wear
  • O-ringed end plug positively seals the balance pressure circuit

Required Tools

Related Parts

You need this if...

Vacuum tests at the ports indicated fail to hold at least 18 in-Hg.

  • 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/Lexus A340E/F

Related Tech Articles

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