Symptoms:

  • Low line pressure
  • High line pressure
  • Poor shift quality
  • Low lube oil flow
  • Burnt clutches

Cause:

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

Correction:

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

Warning:

Required tool kit 89010-Tl is 89010-TL 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 three-spool pressure regulator valve in units with three or fewer solenoids.

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

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

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
  • A340, A340E, A340F, A340H Oversized Pressure Regulator Valve Kit 97855-24K
  • A340, A340E, A340F, A340H Oversized Pressure Regulator Valve Kit 97855-24K
  • A340, A340E, A340F, A340H Oversized Pressure Regulator Valve Kit 97855-24K 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.

A340, A340E, A340F, A340H Oversized Pressure Regulator Valve Kit Vacuum Test Locations