For the truck in my sig, E4OD, 8.8 rear end, std cab, short bed.

I removed the rear drive shaft and then took out the u-joints. Went to the parts place and got new ones. The caps for the new u-joint were too big to fit in my drive shaft, they measured 1.22047" diameter. My old ones measured 1.06299" diameter. So I went back to the parts store and got what I thought were the right one but it isn't. This new u-joint I got (master pro 434) has two caps that is just barely smaller than what I need and 2 that are just larger than what I need.

Does anyone know what part I should be looking for? All I need is for the parts people to take my money for the right part.

 

Can't tell you exactly what you need. But be aware that Ford used some weird U-joints that had 2 different size caps.

 

Yeah, it seems mine has 4 caps, all the same size and smaller than the caps in the u-joints I am finding. The ones I am replacing are after-market but bought so long ago I have no idea what I did to get it right that time.

 

Take it to someone that can open a book. Looking up u joints, even conversion u joints is simply measuring a couple things and running your finger down a line to the part number. There was never a u joint I couldn't find in the catalog.

If the counter guy can't be bothered, take your own mic with you and ask for the book yourself.

 

measure cap diameter and cross length (caps off) and i'll look it up when i get to work.

 

Appreciate it.

I see the old one has a number on the outside: 203. No idea if that means anything but that is the only thing I see.

As best I can tell, the distance from end to end is the same measured both ways, it is 3.6115" and all 4 caps are the same at 1.0635"

 

Everything I find says its takes a common u joint, 4 caps with an outside diameter of 1.06" with an over all length of 3.62" by 3.62".

What I mean by "common" = square u joint, your truck has the flange plate type yoke? what you supplied dimension wise suggests that is true.

If it uses small u bolt straps at the yoke then the u joint wouldn't be the same both ways, it's caps would be 1-1/16" by 1-1/8" instead of 1-1/16" by 1-1/16" and its length both ways would be slightly different as well.

 

should be a moog u-joint 354



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