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slip yoke interchangability (Is that even a word)

J

joshua632

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I recently swapped out the 305/700R4/208 setup out of my 86 k5 for a 355/th350/203 setup out of a 77 3/4 truck. for now I have the rear driveshaft out of a 77k5 that also had a 203 t-case so I bought a conversion u-joint to adapt that to my ten bolt rear end. Now my question is next weekend I am swapping in the 3/4 axle too. Will the slip yoke off of the truck rear d-shaft fit the d-shaft from the 77k5 (this would keep me from buying another conversion ujoint especially since the truck has new u-joints in it.)
 
Really? No one knows if the slip yoke from a 3/4 ton drive shaft will fit on a 1/2 drive shaft. Come on guys someone has done this. I need to know so I can order my conversion u-joint early enough to have it by saturday if necessary.
 
You mean you plan to remove the end of the shaft and weld in the other ? Are you going to have it balanced etc ? I think there is a joint to go from 12 bolt ( your 77 203 shaft was for a 12 bolt truck ) to 14 bolt . /forums/images/graemlins/k5.gif
 
This was posted in the members forum :

Conversions:

1310 (12 bolt) to S44 (10 bolt) 3-3130
Saginaw S44 to 1350 (3/4/1 ton) 2-1153
1310 to 1350 3-3140
 
What i have planned, if it will work is just to swap the slip yokes on the two D-shafts. This way I have the correct U-joint already installed. So i guess what I am asking is are the 3/4 ton and the 1/2 ton driveshafts the same diameter and the same spline count on the slip yoke end? I would just check it myself but my parts truck is 60 miles from here and if they are different I want to have the correct parts ready so I don't have any down time. /forums/images/graemlins/cool.gif
 
I am not even thinking right this morning, your 203 is fixed yoke so shaft has a slip. DUH on my part /forums/images/graemlins/doah.gif Good question. If no one knows you have the number for the u-joint now. /forums/images/graemlins/k5.gif
 
Yeah Thanks I call the local Autozone and they have to order it so I am very grateful for the speedy response. But if anyone knows if the other yoke will fit please respond. Thanks in advance /forums/images/graemlins/cool.gif
 
Are you talking about cutting the shaft and welding in the end from another shaft?

If so, I just had 3 shafts cut down and new slips put on them, and they said that there are different tube thicknesses and would not know until they cut it open.
 
No, I'm not cutting anything I want to know if the slip yoke (the end that slides back and forth) from one will fit the other. I'm just going to change that.
 
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