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B&M Converter Lockup Controller

GM TH700R4, TH200, 200-4R, TH350 and 4L60 Transmissions.

Part # 70244 Be the first to write a review
Estimated shipping date: 12/20/2021
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The B&M converter lockup controller provides dash-mounted control to govern converter lockup at any speed between 30 and 90 mph. These kits eliminate converter lock and unlock cycling and premature unwanted converter lockup.


  • Dash mounted Control for Speeds Between 30-90 mph
  • LED Light Indicates Locked or Unlocked
  • For Use with Mechanical Speedometers
  • Includes Manual Override Switch
  • Includes Hardware

About B&M

B&M Performance & Off-Road has been at the vanguard of the growing automotive aftermarket since the early 1950s. Specializing in performance automatic transmissions and transmission components, B&M will help you put the power to the ground.

Additional ContentsSpeed controller, electrical connectors, pulse generator, speedometer cable, instructions
Brand B&M
Emission Code5
Indicator LightYes
Instructions IncludedYes
Manual OverrideYes
Product TypeAutomatic Transmission Lock-Up Torque Converter Control
California Proposition 65 Chemical NameButyl Benzyl Phthalate (BBP)d
California Proposition 65 RequiredYes
Part Number70244

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.

Works with GM automatic transmissions using a lockup style torque converter and a mechanical speedometer. GM TH-700, 200, 200-4R, 350 and 4L60

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