I'm trying to swap out my front driveshaft, but have run into a difference in yoke sizes. Driveshafts look identical, but the one in my truck uses smaller ujoints than the one I have to put in it. Any reason why this is? I went out and bought new ujoints, installed them and now they won't fit in the yokes on the axle and transfer case.

What to do now?

<a href="http://photobucket.com" target="_blank"><img src="http://i12.photobucket.com/albums/a204/KBrian/parts%20and%2089/BA72A60A-9924-4CF8-832C-455E84F8BAC5-1432-000000C7FC8FCF20.jpg" border="0" alt="Uploaded from the Photobucket iPhone App"></a>

 

Some drivelines use different size yokes. They make conversion u-joints. Take both shafts to a parts store where someone knows how to use a micrometer and they should be able to figure out the correct joint. If knot find someone that can ie another store. It's not rocket science, just requires someone with a little knowledge. Ask for the older guy, you will have a better chance of getting the right part.

 

run a conversion joint, ford had lots of front drivelines in these trucks.