Torque Converter, Hays Twister, 3/4 Race, 1984-91 700R4 30X


9.6″ diameter torque converter with clutch lock-up, 30 spline input, 10-3/4″ bolt pattern

SKU: 039-600698 Category: Tag: Brand:


Hays Twister 3/4 Race performance torque converters are intended for street/strip combinations, with various stall speed offerings to accommodate any mixture of modifications including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads and lower gear ratios. The Twister 3/4 Race torque converter perfectly describes a converter suited for an application just shy of a Full Race converter.


  • 3/4 Race series converters are built, tested, and proven to support up to 650 HP
  • State of the art Spray Welding process is used in select areas. Spray Welding provides clean, strong and consistent fusion while also increasing strength through hardening from higher process temperature
  • Each converter is hand-built and inspected in every step of assembly to ensure top of the line quality
  • All HAYS converters are internally welded compared to brazing. Testing has shown welding provides longer converter life while also enhancing consistency
  • Heavy duty Torrington bearings are used for greater strength and durability
  • Stators are chosen with high flow vents and channels to promote cooling in heat producing higher horsepower applications
  • Increased horsepower and acceleration due to a weight saving, one application design vs a multi-bolt pattern converter.


Anti-Balloon Plate No
Balanced Yes
Bolt Circle 10.75″
Crank Pilot Diameter 1.703″
Diameter 9.6″
Input Spline 30
Lock Up/Overdrive Yes
Use with Power Adder No
Use with Trans-Brake No

Warning: The 3/4 RACE series converters are NOT designed to be used with Nitrous Oxide or with a trans-brake.

Note: An external transmission cooler is recommended for all Hays Twister 3/4 Race Converters with a minimum size of 18,000 GVW or 15,000 BTU rating

Note: Actual stall ranges will vary depending on engine set-up, weight of vehicle and gear ratio.

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