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Symptoms:

  • 1-2 Harsh
  • Harsh shifts
  • Soft shifts

Cause:

Continuous oscillation of the accumulator pressure control valve in the cast aluminum body causes bore wear, which can affect accumulator control pressure.

Correction:

The Sonnax kit contains an oversized valve that allows the worn valve body bore to be refurbished and restores pressure control.

AX4N

Oversized Accumulator Pressure Control Valve Kit
Part No. 36948-20K

1995-1997


View Instructions

Continuous oscillation of the accumulator pressure control valve in the cast-aluminum body causes bore wear, which can affect accumulator control pressure. Wear at the balance port area can prevent the valve from stroking properly, which causes too much resistant pressure to the accumulator pistons and results in harsh shifts. Wear at the outboard spool can allow line pressure to leak to exhaust, resulting in decreased accumulator control pressure and soft shifts. The oversized Sonnax accumulator pressure control valve for the '95-'97 AX4N, 36948-20K, allows the worn valve body bore to be refurbished and restores pressure control to the accumulator control pressure circuits.

  • Valve is manufactured from hard-anodized aluminum to resist wear.
  • Oversized valve allows bore refurbishing to eliminate excessive clearance and restore hydraulic integrity.
  • Recalibrated spring has been added to compensate for the oversized valve and restore proper shift feel.
  • Reamer kit 36948-TL allows you to enlarge the bore to accept an oversized valve, and works for the '95-'97 AX4N as well as E4OD and 4R100 applications.

Reamer kit 36948-TL is no longer in production but may be available from distributor inventory.

  • 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.

Ford AX4N/4F50N Valve Body Layout

Ford ax4n 450n
  • 36948 20k combo
  • 36948 20k