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Mopar speedometer pinions  for  A488, A904, A727, A998, A999 automatic transmissions had the following original part numbers.  Some PNs have been superseded:

Early (1957-1965) Transmissions
  • 16 teeth - PN 2204355/Brown
  • 17 teeth - PN 2204356/Orange
  • 18 teeth - PN 2204357/Purple
  • 19 teeth - PN 2204358/Blue
  • 20 teeth - PN 2204359/Green
  • 21 teeth - PN 2204360/Gray
Late (1966-1989) Transmissions
  • 24 teeth - PN 2538924/White
  • 25 teeth - PN 2538925/Blue
  • 26 teeth - PN 2538926/Red
  • 27 teeth - PN 2538927/White
  • 28 teeth - PN 2538928/Blue
  • 29 teeth - PN 2538929/Black
  • 30 teeth - PN 2538930/Yellow
  • 31 teeth - PN 2538931/Green
  • 32 teeth - PN 2538932/Black
  • 33 teeth - PN 2538933/Yellow
  • 34 teeth - PN 2538934/Green
  • 35 teeth - PN 2538935/Orange
  • 36 teeth - PN 2538936/Red
  • 37 teeth - PN 2538937/White
  • 38 teeth - PN 2538938/Blue
  • 39 teeth - PN 2538939/Green
  • 40 teeth - PN 2538940/Orange
  • 41 teeth - PN 2538941/Red
  • 42 teeth - PN 2538942/White
  • 43 teeth - PN 2538943/Blue
  • 44 teeth - PN 2538944/Black
  • 45 teeth - PN 2538945/Yellow