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

A340, A340E, A340F, A340H

Oversized Pressure Regulator Valve Kit

Part No.

97855-24K

Oversized Pressure Regulator Valve Kit
  • 97855-24k_combo

  • Oversized Pressure Regulator Valve Kit

  • 89010-03k-04k-24k

Small_97855-24k_combo Small_97855-24k Small_89010-03k-04k-24k

A340, A340E, A340F, A340H

Oversized Pressure Regulator Valve Kit

Part No. 97855-24K

  • Valve
  • Spring

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

Complaint:

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

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.

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.
ApplicationValve Body IdentificaitonSonnax 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
WARNING:

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

NOTE:

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

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