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Pressure Regulator Valve
Part No. 28999-03

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The OE pressure regulator valve in GM Powerglides is prone to rusting in the bore of valve body cores, and is often prone to damage during removal. Sonnax pressure regulator valve 28999-03 is a hardened and precison ground direct replacement that allows salvage of these cores. Slight modifications to the size, number and location of the annular grooves provide better hydraulic sealing and prevention of side-loading for this replacement valve.

  • Replacements not available
  • Improved hydraulic seal
  • Reduced side-loading
  • Drop-in replacement with improved tolerances
  • 28999 03