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Symptoms:

  • No Drive when hot
  • Default mode
  • Pressure regulation codes
  • Pressure sensor reading low

Cause:

Pressure regulator and plunger valves and bores show significant wear.

Correction:

Sonnax has designed an oversized valve that restores OE normal line pressure and shift concerns.

AL-4, DPO

Oversized Pressure Regulator Valve Kit
Part No. 120940-01K


You need this if... View Instructions

Excessive Renault/Peugot AL-4 and DPO plunger valve and bore wear results in high line pressure conditions. Excessive wear of the pressure regulator valve and bore in these units may cause low, high or unstable line pressure issues. Reconditioning the bore and installing Sonnax oversized pressure regulator valve kit 120940-01K restores correct pressure regulator and plunger valve operation to provide appropriate line pressure for all operating conditions.

  • Salvages valve bodies for reuse
  • Restores nominal OE line pressure and eliminates related shift problems
  • Hard anodized aluminum valves resist wear
  • Pressure Regulator Valve
  • Plunger Valve
  • Pressure Regulator Spring
  • 120940 01k combo
  • 120940 01k

You need this if...

Vacuum tests at the ports indicated (A, B, C & D) do not hold 18" or if a Wet Air Test at the same locations result in leaking at the corresponding ports.

  • 120940 01k plateside