Symptoms:

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

Cause:

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

Correction:

Sonnax oversized pressure regulator valve kit allows the valve body bore to be refurbished and restores proper pressure control.

Warning:

Required tool kit 89010-TL is no longer in production. Check with your distributor for availability

A140, A540E

Oversized Pressure Regulator Valve Kit
Part No. 89010-03K

Replaces .458" long OE large spool design

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 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.
Application Valve Body Identificaiton Sonnax Part
A140 89010-03K
A340/E/F/H 3-Spool pressure regulator valve, 3 or fewer solenoids (early) 97855-24K
A540E Not stamped A540Y 89010-03K
A540E Stamped A540Y ('98-'00) N/A

Neither of the parts listed above work for the A340* 4-spool pressure regulator valve, 4 or fewer solenoids (late).

  • Valve
  • Spring
  • Spacer
  • A140, A540E Oversized Pressure Regulator Valve Kit 89010-03K
  • A140, A540E Oversized Pressure Regulator Valve Kit 89010-03K
  • A140, A540E Oversized Pressure Regulator Valve Kit 89010-03K 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.

A140, A540E Oversized Pressure Regulator Valve Kit Vacuum Test Locations
A140, A540E Oversized Pressure Regulator Valve Kit Vacuum Test Locations