78 C10 454 T400 u-joint

[meanbite]

Hey ya'll. I need to know what u joint I need for the axle end of my driveshaft. My truck is a factory heavy duty towing package. The caps for the driveshaft itself are smaller than the caps for the axle housing. nothing I can find at any parts store is the right piece. Any help would be greatly appreciated. Thanks!

Ps. I just need the position 3 u joing, I already have positions 1 and 2

Will

[88Jimmy4x4]

your gonna need to measure it to be sure

follow this guide and you will be fine

http://driveshaftspecialist.com/HTML...D%20Guide.html

[meanbite]

Thanks I just called them. I got to get some measurements together and give them a call back.

[meanbite]

I wonder, does the 2 different size caps mean that the rear end had been replaced at some point and a conversion u joint used? Would the factory use something like that?

[meatwagon83]

half ton is probably a 1310, but dont quote me on that!