Product Summary

Universal Fit, Single Joint Universal Joint Style

  • Features full compliment bearings
  • Comes with a 3/4"-36 spline that has a .750" O.D.
  • Made of forged vanadium steel with a black oxide coating
  • They are the highest quality and ideal for racing or street
  • Has needle bearing u-joints and a max operating angle of 30-degrees

Key Specs

MFG. Part #401-51220
BrandSweet Manufacturing
Spline Count36

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Sweet Manufacturing 401-51220 Details

Dont jeopardize your safety with inferior quality Mustang II power rack U joints. Speedway offers only the finest steering U-joints made by Sweet Manufacturing. These steering universal joints have full compliment bearings and 3/4"-36 spline.

  • Full compliment bearings
  • Forged Vanadium steel yokes and u-joint
  • Highest quality for racing or street
  • Features needle bearing u-joints
  •  3/4"-36 Spline to GM 1" DD

Learn more about u-joints and steering systems by reading our tech article. U-Joint Selection and Design.

Note: GM columns measure slightly less than 1" while IDIDIT and Flaming River columns measure a true 1".  DO NOT interchange these u-joints.

Item Details

GM Manual, Mustang II Power
3/4"-36 Spline

1" DD on this U-joint is undersized and application specific to the 1" DD on an OEM GM column.  Therefore, this unit is not applicable to an aftermarket 1" DD column such as the Ididt or Flaming River applications which measures out to the full 1.000" DD application.  


When purchasing U-Joints, 3 easy steps will help ensure that they will be correct for your application.

Be sure to measure the diameter of the shaft and count the number of splines on the shaft. Some shafts have a blank spot ground on one side. To get the correct number of splines, use a flat edge and cover the blank half of the shaft through the diameter and count the splines on the other half. Multiply that number by 2, thus giving you the total number of splines on the full circumference of the shaft.


Choose which shaft type best suits your application: 3/4" weld on, 3/4" DD or 1" DD.

With these two pieces of information at hand, refer to our chart to find the appropriate part number of the ujoint for your specific application.

Sweet Manufacturing 401-51220 Specifications

MFG. Part #401-51220
BrandSweet Manufacturing
Spline Count36
Universal Joint StyleSingle Joint
End #11" DD GM OEM
End #23/4"-36 Spline
Spline OD.750"
Spline End3/4"-36
Overall Length3.75"
Outside Diameter1.355"
Max Operating Angle30 °
Set Screw IncludedNo
Material TypeSteel
Sold in QuantityEach