U-Joint Differences

Spicer u-joints are the best and worth asking for. Independent testing done by Warn Industries found that as far as sheer breaking strength, the closest competitor was 85 percent of the Spicer and the other brands went down from there.

Outlined here are the most common 1310 series which fit most jeep applications:

5-153X (~$12.00)
Very popular, inexpensive, and long lasting. Grease fitting located in the body of the cross, which lessens its torque capacity. A little looser fit than would be ideal for high speed applications

5-433-1x (~$25.00)
I consider this to be their best joint. This joint is stronger than the 5-153 for high impact loads. Grease fitting is located in the end of one of the bearing caps and the body of the cross is drilled with a small hole.

5-625X (~$20)
This is the joint Spicer supplies to OEM and they think it is the best joint they have ever made. This is a non-greaseable joint and we are continually changing these out on relatively new/low mileage vehicles. Most times, the joint haven't worn out, but failed because water entered the joint through the seals and started rusting, which caused a "squeaking noise".