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Transkit For 1996 and up 4L80E


PART# 70227

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The BM TransKit contains all the parts necessary to convert your stock transmissions to the same basic specifications found in the famous BM Transmission. It includes high performance friction materials, a complete overhaul gasket set, a drain plug kit, and all of the parts necessary. These improvements provide firm positive shifts, while retaining full automatic features.


  • Same Quality Components used in B&M Street/Strip Transmissions
  • Includes B&M Transpak Modification Components
  • B&M High Performance Friction Materials
  • Includes Easy to Follow Instructions
  • Improves Shift Action and Times
  • Over 65 Years of B&M Quality


Emission Code5
Gasket IncludedYes
Product TypeAutomatic Transmission Master Repair Kit
California Proposition 65 Chemical NameCadmium and cadmium compounds
California Proposition 65 RequiredYes
Part Number70227



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.

In The Box

In The Box

  • High performance friction materials
  • a complete overhaul gasket set
  • a drain plug kit
  • all of the parts necessary

Tech Resources

All 1996+ GM Vehicles with the 4L80E transmission. This kit will not work on 1991-1995 4L80E transmissions.


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