Manual Valve
Part No. 28999-04

Wide-spool design replaces wide- or narrow-style OE valve.

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Sonnax manual valve 28999-04 is a direct OE replacement for damaged or missing valves in GM Powerglides.

  • Wide-spool design is suitable for replacing both narrow and wide OE valves
  • Hardened for improved wear resistance
  • Precision-ground diameters for proper clearance
  • Drop-in Zip Valve™ installs quickly and easily
Learn More About Zip Valve™ Drop-In Repairs
  • Powerglide Manual Valve 28999-04