Some of the most common questions I get on an almost daily basis here at ProShaft are: how do I know what series my u-joint is? and how do I know which transmission yoke I need?
We've got a full article with dimension chart on transmission and transfer case yoke identification that you can find here:
The process basically involves counting the splines inside the yoke, measuring the ground hub diameter, measuring the yoke width, measuring the yoke height, and measuring the u-joint cap hole diameter.
When it comes to u-joint identification, the task is much easier. Essentially, we need to first know the u-joint "lock-up" type. That is, whether the u-joint uses inside clips (snap rings) or outside clips (snap rings). If our u-joint uses inside clips, we measure the contact points where the clips will contact the yoke to keep itself centered when installed.
If your u-joint uses outside clips, we only need to measure the width of the u-joint with the caps on (just the u-joint, not the yoke that it is installed in).
Whether our u-joint uses inside clips or outside clips, we need to determine the bearing cap diameter.
Currently, we're working on the tutorial with full color pictures on how to determine u-joint series. We'll also be creating a handy chart with corresponding part numbers to make it easy for you guys to determine your u-joint type and take some of the mystery out of drive shaft work.
Thanks for reading guys and stay tuned for our upcoming Driveshaft How-To articles!
Justin from ProShaft