Packard Forum Index » Pre-War (1899-1942)

The front joint is a Detroit ball & trunion joint. It functions as both a u-joint and a slip yoke. This type was widely used on Chrysler, Dodge, and Plymouth products for many years.

Roberts Motor Parts offers a rebuild kit for later Mopar applications. I have no idea what will or will not fit the Packard application. I've never encountered that type joint on a non-Mopar application.

Unless leaking profusely, and you need to change the pinion seal, don't touch that center pinion bolt. That is the rear half of U-joint that bolts to the differential. That has a very specific pre-load on it that you dont want to disturb unless absolutely required.