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  • Clutch & band failures
  • Loss of lube oil
  • Low line pressure
  • High line pressure
  • Soft shifts
  • Harsh shifts
  • Low converter pressure


Continuous oscillation of the pressure regulator valves causes valve body bore wear, which results in line pressure irregularities and valve instability.


Oversized valve allows the valve body bore to be refurbished and restores proper pressure control.


Installation requires reaming with Tool Kit 89010-TL. This tool kit is no longer in production. Check with your distributor for availability

A340, A340E, A340F, A340H

Oversized Pressure Regulator Valve Kit
Part No. 97855-24K

Replaces 3 spool pressure regulator valve in units with 3 or fewer solenoids

You need this if... View Instructions

The continuous oscillation of the pressure regulator valve wears the valve body bore. If severe wear occurs at the balance line circuit, the pressure regulator valve won't stroke to reduce line pressure and feed the converter/lube circuits. This can result in high line pressure, harsh shifts, reduced converter pressure and loss of lube. Severe wear at the other pressure regulator valve circuits can allow line pressure to exhaust or go to sump, resulting in low line pressure, soft shifts, and burned clutches and bands. The Sonnax oversized valves 89010-03K, 89010-04K and 97855-24K allow the valve body to be refurbished to restore proper clearances. See chart to find which part fits your application.

  • Oversized, hardened steel valves allow valve body to be refurbished to restore hydraulic integrity.
  • One tool kit for all three applications.
Application Valve Body Identificaiton Sonnax Part
A140 89010-03K
A340/E/F 3 land pressure regulator valve, 3 or fewer solenoids (early) 97855-24K
A540E Not stamped A540Y 89010-03K
A540E Stamped A540Y ('98-'00) 89010-04K

If stamped A540Y on valve body for application A540E (98-00), use 89010-04K.

  • Valve
  • Spring

January 16, 2014

Toyota A340E/F Identification Guide

Topics: Identification Guides Transmission Toyota/Lexus A340E Transmission A340F Transmission

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  • 97855 24k combo
  • 97855 24k
  • 89010 03k 04k 24k

You need this if...

  • 97855 24k test