• Early upshifts
  • Late upshifts
  • 2nd Gear starts


The primary governor valve wears or sticks, creating erratic governor oil pressure.


The Sonnax drop-in, wear-resistant primary governor valve has longer lands and more support area.

42RH, 46RH, 47RH, A904

Primary Governor Valve
Part No. 12802-01

Fits ‘90-‘03 units only.

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The OE aluminum governor valves in listed Chrysler RWD units become worn because the soft-coat anodizing wears off. The valve is not being optimally supported in the bore because the OE valve land is narrow. Sonnax primary governor valve 12802-01 has been improved over the OE version in both material and configuration for greater durability and performance.

  • Hardcoat anodized aluminum combats premature wear
  • Includes longer valve land for better support to reduce bore wear and maintain shifting consistency
  • Valve can also be installed into new governor bodies to prevent future wear from occurring
  • Use of this valve will not change shift timing/governor pressure from OE calibration
  • Drop-in Zip Valve™ installs quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • 42RH, 46RH, 47RH, A904 Primary Governor Valve 12802-01
  • 42RH, 46RH, 47RH, A904 Primary Governor Valve 12802-01