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Old March 14th, 2010, 09:26 PM   #1
Kodiak450r
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u joint measurement

does anyone know off hand what the standard u joint size that GM would use on a S-10 blazer? is it a 1310, 1330, or 1350? i've heard of them being called a 3 rivers joint which i'm guessing is it's own unit. basically what i need to know is which pinion yoke to buy to run my waggy D44's with stock S-10 blazer driveshafts.
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Old March 14th, 2010, 09:27 PM   #2
kj kyle
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did you try looking it up on Autozone.com or something. then cross reference the p/n
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Old March 14th, 2010, 09:30 PM   #3
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Quote:
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did you try looking it up on Autozone.com or something. then cross reference the p/n
yea. no dice.
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Old March 14th, 2010, 10:03 PM   #4
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If you have the mating parts why not measure them?
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Old March 14th, 2010, 10:19 PM   #5
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It depends on your T-case, trans, and motor.

I used to mess around with S-trucks quite a bit, and the rear driveshafts were specific to specific options. The bigger the motor the bigger the U-joints, and the push button T-cases in the later models used fullsize stuff where the earlier manual shift T-cases used smaller joints.

X3 on trying autozone or just measuring what you have.
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Old March 15th, 2010, 06:09 AM   #6
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i can measure it but idk how to convert the measurements into a size. the yokes i'm looking at only say 1310, 1350, or 3R.
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Old March 15th, 2010, 08:39 AM   #7
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Old March 15th, 2010, 09:48 AM   #8
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3R joints (Saginaw) have clips on the INSIDE of the driveshaft and pinion yoke. There is only one size.

1310/1330 (Spicer) have clips on the OUTSIDE of the u-joint caps. Size is as follows:

1310: Width 3.219, Cap OD 1.063
1330: Width 3.625, Cap OD 1.063
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Old March 15th, 2010, 03:59 PM   #9
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Quote:
Originally Posted by Jeeperz Creeperz View Post
3R joints (Saginaw) have clips on the INSIDE of the driveshaft and pinion yoke. There is only one size.

1310/1330 (Spicer) have clips on the OUTSIDE of the u-joint caps. Size is as follows:

1310: Width 3.219, Cap OD 1.063
1330: Width 3.625, Cap OD 1.063
awesome thanks. just what i needed to know.
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Old March 15th, 2010, 04:04 PM   #10
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ok so what i've found is that all my driveshafts are 3 rivers joints. even the 1 ton driveshaft i have uses the same size joint as my s-10 blazer. thats handy to know that one size fits all.
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