What is the stock General Motors u-joint called?
General Motors typical u-joint size found on most passenger cars and light trucks is commonly know by a few names. They may be referred to as “3R” or “S44” or “Saginaw” but they are all one in the same. Depending on who is doing the talking you may hear any one of these terms. The factory original u-joints are held into the yokes by injected plastic. This u-joint is similar in size to the 1330 series. The replacement u-joints utilize the inside “C” clip design to hold the u-joint within the yoke whereas the 1330 series uses the outside snap ring design. You should be extremely careful not to heat the plastic with a torch to remove the original u-joints because the heated plastic will emit toxic fumes that are not good for your health.
