Product Summary

Universal Fit, Single Joint Universal Joint Style

  • Specifically designed for the Big GM Pre 1978 applications
  • These steering universal joints are 13-16"-36 spline
  • They feature forged Vanadium steel yokes
  • Has full compliment bearings and a needle bearing u-joint
  • Made specifically to put up with all the rigors of racing

Key Specs

MFG. Part #401-51120
BrandSweet Manufacturing
Spline Count36

Need To Know

Free Shipping on Orders Over $149

Shipping Policies & FAQs

Quick and Easy Returns

Return Policy

Sweet Manufacturing 401-51120 Details

Dont jeopardize your safety with inferior quality steering components. Speedway offers only the finest steering U-joints available. Made by Sweet Manufacturing. These steering universal joints are 13-16"-36 spline and feature forged Vanadium steel yokes.

  • Full compliment bearings
  • Forged Vanadium steel yokes and u-joint
  • Highest quality for racing or street
  • Features needle bearing u-joints
  • 13/16"-36 Spline
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

'Big GM Gear Box, Pre ''78
13/16"-36 Spline'


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 401-51120 Specifications

MFG. Part #401-51120
BrandSweet Manufacturing
Spline Count36
Universal Joint StyleSingle Joint
End #11" DD GM OEM
End #213/16"-36 Spline
Spline OD.8125"
Spline End13/16"-36
Overall Length3.75"
Outside Diameter1.355"
Max Operating Angle30 °
Set Screw IncludedNo
Material TypeSteel
Sold in QuantityEach
Notes1" DD IS .985 ID