• 2-3 Concerns
  • 3-2 Concerns
  • Soft shifts
  • Erratic buzz
  • Uncontrolled pressure in Reverse
  • Low line rise


Breakage or collapse of the channel plate/lower cover checkball spring.


Replace the spring with Sonnax checkball spring.

01M, 01N, 01P

Checkball Springs
Part No. 119940-20

For use in Phase 2 valve bodies.

Package Quantity: 10

View Instructions Find a Distributor

The channel plate/lower cover checkball and spring in the various VW/Audi 01M, 01N and 01P units aid in controlling solenoid regulator pressure. When the spring breaks or collapses, proper fluid control is not maintained, resulting in 2-3 and 3-2 shift complaints. Sonnax checkball spring 119940-20 restores proper fluid control.

  • Direct replacement
  • Maintains proper solenoid regulator pressure control

Some of the Phase 0 and 1 valve bodies (096, 097, 098) also contain this checkball spring. This replacement spring may be used in those applications after the location and spring specifications are verified. The OE spring should measure .008 wire diameter, .178–.194" outside diameter, and approximately .280" long in order to use this replacement 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.

VW/Audi 096, 097, 098, 01M, 01N, 01P Valve Body Layout

VW/Audi 096, 097, 098, 01M, 01N, 01P Valve Body Layout
  • 01M, 01N, 01P Checkball Springs 119940-20
  • 01M, 01N, 01P Checkball Springs 119940-20