Symptoms:

  • Delayed engagement
  • Engine stall at idle
  • High line pressure in Reverse
  • Erratic line pressure
  • No line rise

Cause:

Wear at the large end of the main regulator valve can cause low line pressure. Wear at the inboard end of the main regulator valve causes high line pressure.

Correction:

Sonnax now offers an oversized valve kit for the main regulator valve with improved boost oil circuit and improved converter feed.

01M, 01N, 01P

Oversized Main Pressure Regulator Valve Kit
Part No. 119940-03K


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

In VW/Audi 01M, 01N and 01P units, regulated line leaks to exhaust at the pressure regulator, it creates a low pressure condition. Wear at the inner balance spools prevent the valves from stroking, which can cause high line pressure. Wear at the inboard bore also affects the K1 clutch circuit, which can result in 1-2 or 2-3 shift complaints. Sonnax oversized main pressure regulator valve 119940-03K allows the valve bores to be refurbished.

  • Oversized hard-coat anodized aluminum valves restore hydraulic integrity of the circuits and prevent wear
  • Contains an O-ringed end plug to positively seal the bore and prevent regulated boost line pressure from exhausting
  • A new spring is included to work with the oversized valve and re-establish OE regulated pressure specifications
  • Valve
  • Spring
  • End Plug
  • O-Rings (2) 1 extra
  • 01M, 01N, 01P Oversized Main Pressure Regulator Valve Kit 119940-03K
  • 01M, 01N, 01P Oversized Main Pressure Regulator Valve Kit 119940-03K

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.

01M, 01N, 01P Oversized Main Pressure Regulator Valve Kit Vacuum Test Locations