B&M 70421 Holeshot 3000 Torque Converter

Compatible with 1984-93 GM TH700R4/4L60 30 spline input shaft. 10.75 and 11.50 in. bolt circles. 2800-3200 RPM stall

PART# 70421

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For 1984-93 GM TH700R4/4L60 automatic transmissions with 30 spline input shaft. This converter does not retain the lock-up feature.


This HoleShot 3000 fits 1984-93 GM TH700R4/4L60 automatic transmissions with 30 spline input shaft. This converter does not retain the lock-up feature. Holeshot torque converters are for serious-minded performance enthusiasts and offer additional strength and durability features not found in our Tork Master or Traveler series of converters. The Holeshot 3000 converter is an excellent choice for vehicles with some performance engine modifications, particularly big cams that tend to reduce low-end power and torque. The higher stall speed of this converter will launch the car in a higher rpm range where more torque is readily available, resulting in quicker acceleration. Holeshot converters feature furnace brazed impeller fins and turbine, new precision alloy impeller hub and new heavy duty needle bearings. Other features include fully balanced and pressure tested by expert technicians. If your vehicle is equipped with a plate type nitrous system or supercharger, please refer to the Nitrous Holeshot line of converters. Notes: Stall speed listings are based on engines producing 230lb. ft. of torque at 2,500 rpm. More torque at 2,500 rpm will give you more stall speed, less torque at 2,500 rpm will give you less stall speed than the stall speed ratings indicated. Higher stall converters can generate more heat, so we highly recommend adding a transmission cooler. This converter is Not recommended for supercharged, plate-type nitrous oxide or trans-brake applications. The product images shown are for illustration purposes only and may not be an exact representation of the product. Does Not fit 4L60E transmissions. Both 10.75 and 11.50 in. bolt circles

Product Attributes

Emission Code5
Manufacturer Part Number70421
Product TypeTorque Converters
California Proposition 65 RequiredNo
Part Number70421



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.

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