Conversion U-Joint | 1330 Series to 1350 Series

1330 to 1350 U-Joint It is possible to come across car builds that have u joints of different sizes. U-joint sizes are classified by a series number. Each series has a very specific cap diameter and overall joint width. Normally, the larger the U-Joint the stronger it is. The 1330 to 1350 U-Joint is a mix of two different series specifications on the same u-joint so that that different sized yokes and driveshafts can be connected. The strength of the u-joint depends on several factors, material, design, the presence of a grease fitting, cap size, etc. Take note that the u-joint is only as strong as the smallest series number. The 1330 to 1350 U Joint cross width is 3.625 (3 5/8”) on both sides, while the cap diameters are different. 1 1/16″ on the 1330 side and 1 3/16″ on the 1350 side.