B&M 20298 | Manual Transmission Case Plug

Part Number
Transmission Speedometer Port Plug; Fits w/Tremec TKO 3550/Borg Warner T-45/T-5/T-56 Magnum Transmissions; Black Anodized Finish
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B&M Racing & Performance brings you this billet aluminum speedometer port block-off plug that fits all Tremec 3550, T-5, TKO 5 speeds, Magnum 6 speeds and Borg Warner T-45 manual transmissions. The plug is used to block the mechanical speedometer gear port when upgrading to an electronic speedometer and keep contaminents from getting in your transmission. It features a black Mil-Spec anodized finish for long lasting good looks, even in harsh conditions. Comes with installation instructions for an easy and quick installation.



  • Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
  • Fits the Following transmissions: Tremec TKO; 3550; Borg Warner T-45; Ford T-5 and T-56 Magnum
  • Transmission Speedometer Port Plug; Fits w/Tremec TKO 3550/Borg Warner T-45/T-5/T-56 Magnum Transmissions; Black Anodized Finish;
  • Blocks Mechanical Port When Upgrading To Electronic Speedometer
  • Transmission Speedometer Port Plug
  • Easy Installation
  • Keeps Contaminants Out
  • 20298;bm;b/m;performance;speedometer;port;plug;tremec;block;off;anodized;aluminum


Automotive Item GradeHigh Performance
California Proposition 65 Chemical Name 1Chromium (hexavalent compounds)
Package ContentsPlug and Associated Hardware
Transmission Model3550
Transmission ModelT5
Transmission ModelT-45
Transmission ModelTremec TKO
Transmission ModelT56 Magnum
WARNING CA Proposition 65Yes
WARNING CA Proposition 65 MessageWARNING: Cancer and Reproductive Harm - www.P65Warning.ca.gov


Customer Questions
How do I install Dorman shift linkage bushing?
To install a Dorman shift linkage bushing, first locate the old bushing and remove it if necessary. Apply lubricant to the Dorman bushing and slide it onto the shift linkage, tapping it into place with a soft tool until fully seated. Check the alignment and function of the shift linkage after installation.
How to install energy suspension bushings?
To install Energy Suspension bushings, remove old bushings, press or tap in new bushings using a bushing installation tool, clean and lubricate suspension components, and follow specific instructions provided by Energy Suspension.
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