GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

help with driveshaft measurements

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Old Mar 31, 2013 | 09:47 PM
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Default help with driveshaft measurements

Hey fellas, Im without my truck for several more weeks (playing Army). I am trying to get my ducks in a row so when I come home we can jump on the dyno for tuning.

That being said, Does anyone have these #'s or would a few of you guys mind measuring your driveshafts IAW DSS measurement protocol? I know this is a pain...

I need the measurement for a 6.2L NNBS CC Z71/4wd rear DS.

Wanting to get the DSS one ordered up. This is long overdue for my truck

Thanks!!!
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Old Apr 2, 2013 | 09:53 AM
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Pm HAMMER, he would prob know all that off the top of his head.
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Old Apr 2, 2013 | 11:48 AM
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Originally Posted by carbongmc
Pm HAMMER, he would prob know all that off the top of his head.
If you get the measurements from HAMMER throw them up on here, I'm interested as well.
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Old Apr 2, 2013 | 01:53 PM
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I believe it's 67.5" from center to center of joint but I'll check when I get home for sure
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Old Apr 2, 2013 | 02:20 PM
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Yup 67.5" if you have 4x4 Z71 with 14bolt rear and 1350 joints like mine. I am also ordering a Driveshaft Specialties D-shaft that's gunna be 5" aluminum .125 wall. I'm getting mine an 1" longer tho due to the 4.5" lift on my truck!
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Old Apr 2, 2013 | 02:29 PM
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Driveshaft Specialties of Texas makes an awesome product .. i have the 5" HD shaft myself .. no issues
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Old Apr 2, 2013 | 05:54 PM
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Are they balanced to a high rate of speed?
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Old Apr 2, 2013 | 08:06 PM
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Nobody can balance a shaft higher than Dennys Driveshaft (10,000rpm shaft speed) but the longest they can make is 65" long :-[

Driveshaft specialties has the next best thing tho with .125wall thickness and 5" diameter combined with 67.5" moves the "critical speed" well up into the 130mph range or more! But as far as balancing it I believe 3,500 shaft rpm is what they do.
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Old Apr 29, 2013 | 09:31 PM
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Originally Posted by HAMMER!
Nobody can balance a shaft higher than Dennys Driveshaft (10,000rpm shaft speed) but the longest they can make is 65" long :-[

Driveshaft specialties has the next best thing tho with .125wall thickness and 5" diameter combined with 67.5" moves the "critical speed" well up into the 130mph range or more! But as far as balancing it I believe 3,500 shaft rpm is what they do.
That 67.5" is for a 6.2l 6l80 4x4 CC right? I believe the 6.2l only came with the 6l80 but now im questioning myself.
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Old Apr 30, 2013 | 10:16 AM
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Originally Posted by TheBurlyMan
Hey fellas, Im without my truck for several more weeks (playing Army).
Thanks for your service!
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