Trying to figure out these u-joints and conversions...

[pvfjr]

So we're trying to put an AMC 20 rear into an 89 S10 blazer. It seems like the Model 20 has 1310's in it, as they're the same as my old 1/2 ton chevy. No problem there. What I can't figure out is what's in the S10's driveshaft. They're quite a bit bigger than the 1310's, and they don't fit the yoke I have laying around that is supposedly 1350. So would they be 1330's or S44? I'm not familiar with those ones, and don't know how to tell. Isn't there some site somewhere that tells you all the trunion and bearing cap measurements to ID them? I can't find anything.

 

[masterbeavis]

not much help, but you might find this site interesting.

http://www2.dana.com/expert/wc.dll?hvtss~dedsec~

 

[kennyw]

I posted some measurements I took when trying to figure out the conversion joint for my truck sometime back...

http://coloradok5.com/forums/showthread.php?t=83873&highlight=ujoint

Maybe that might help?

 

[pvfjr]

Well the waggy rear defintely calls for 1310. I thought the blazer driveline had 1330, but now it looks like it may actually be the Saginaw 3R.

From what I can tell...
1310: 3 7/32 width, 1 1/16 cap
1330: 3 5/8 width, 1 1/16 cap
3R: 3 5/8 width, 1 1/8 cap
1350: 3 5/8 width, 1 3/16 cap

So the 3R is the same width as the 1330 and the 1350, but in between the two in cap sizes. This threw me off a little, cause I wasn't even aware that 3R existed. But now the info is here for someone else to find....

I'll eventually post up the Napa part # and price of the joint if I end up being successful.

 

[masterbeavis]

Well the waggy rear defintely calls for 1310. I thought the blazer driveline had 1330, but now it looks like it may actually be the Saginaw 3R.

From what I can tell...
1310: 3 7/32 width, 1 1/16 cap
1330: 3 5/8 width, 1 1/16 cap
3R: 3 5/8 width, 1 1/8 cap
1350: 3 5/8 width, 1 3/16 cap

So the 3R is the same width as the 1330 and the 1350, but in between the two in cap sizes. This threw me off a little, cause I wasn't even aware that 3R existed. But now the info is here for someone else to find....

I'll eventually post up the Napa part # and price of the joint if I end up being successful.

Did the dana site help any?