This plug is used to block the mechanical speedometer gear port when upgrading to an electronic speedometer and includes a replaceable Viton rubber o-ring. It features a black billet aluminium anodized finish for long lasting good looks, even in harsh conditions.

Suits most transmissions with .875" / 7/8" port

Fits These GM Automatic & Manual Transmissions

  • Muncie M20, M21, M22 4 speed
  • Muncie 3 speed
  • Saginaw 3 & 4 speeds
  • T-5 5 speed WC & NWC
  • T-4 4 speed
  • TH350
  • TH350C
  • TH250
  • TH350C
  • 200-4R
  • Powerglide

Supplied with unc & unf stainless button head fasteners