Symptoms:

  • TCC apply & release concerns
  • Burnt TCC apply components
  • Overheated transmission
  • Bushing wear

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 valve with the oversized Sonnax valve kit.

A340E, A340H

Oversized Secondary Pressure Regulator Valve Kit
Part No. 97741-17K


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

In Toyota A340E/H Early (Type 1) units (Figure 1), the secondary pressure regulator valve 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 cast aluminum sleeve creates wear, allowing this valuable fluid pressure to exhaust and resulting in converter complaints, burnt apply components and lube-related failures. Sonnax oversized secondary pressure regulator valve kit 97741-17K restores proper hydraulic clearance 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
  • Valve
  • End Plug
  • O-Rings (2) 1 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 A340, A340E/F/H Valve Body Layout

Toyota/Lexus A340, A340E/F/H Valve Body Layout
  • A340E, A340H Oversized Secondary Pressure Regulator Valve Kit 97741-17K
  • A340E, A340H Oversized Secondary Pressure Regulator Valve Kit 97741-17K
  • A340E, A340H Oversized Secondary Pressure Regulator Valve Kit 97741-17K details

You need this if...

Vacuum tests at the ports indicated fail to hold at least 18 in-Hg, or if visual wear is detected in the bore (Figure 2).

A340E, A340H Oversized Secondary Pressure Regulator Valve Kit Vacuum Test Locations