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Nnbs driveshaft limit?

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Old 05-20-2016, 06:53 AM
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You might be ok. Just make sure you have enough in and out play for the driveshaft so nothing binds when the suspension compresses.

My NBS def needed a modded shaft. The old one won't fit at all.
Old 05-20-2016, 01:41 PM
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Originally Posted by vettelovralexand
I hear people say this, but I think they usually are referring to the 2wd shaft when they quote the 100ish mph limit. Anyone broken a 4wd rear shaft?
Destroyed my factory 4wd shaft. Went back and managed to find 3 pieces of it.
Old 05-20-2016, 02:06 PM
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Originally Posted by rocknZ71
Destroyed my factory 4wd shaft. Went back and managed to find 3 pieces of it.
How fast were you going?
Old 05-20-2016, 02:09 PM
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Somewhere north of 100. Gauge pod on the steering column blocks speedo above 100.
Old 05-20-2016, 02:44 PM
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Wondering if my driveshaft isnt the causenof my vibration ive got going on....... Or if its the worn out mickey thompsons i have on it....
Old 05-20-2016, 02:50 PM
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Originally Posted by Wolftrk99
Wondering if my driveshaft isnt the causenof my vibration ive got going on....... Or if its the worn out mickey thompsons i have on it....
Well if I was a betting man I'd say the latter. But if I actually laid money down it would end up being the driveshaft. Lol
Old 05-20-2016, 02:51 PM
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Originally Posted by Wolftrk99
Wondering if my driveshaft isnt the causenof my vibration ive got going on....... Or if its the worn out mickey thompsons i have on it....
What speed you feel it?

Mine vibrates from 50-65mph, you know that important highway speed.
Old 05-20-2016, 04:05 PM
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I start feeling mine at about 35 or so.... I have a new bfg atko i am about to out on it, need get with one of the writers at my part time job to find me a couple more, bfg discontinued the load range d ko and as far as i can tell arent making the ko2 in lrd and i really dont want e load range tires..... But i get a hefty discount on certain tires at my part time job, so.....
Old 05-20-2016, 04:10 PM
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Not even going to start on the wheel hop/axle wrap i have.....
Old 05-21-2016, 12:25 PM
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Originally Posted by FFDP
Stock aluminum driveshaft will vibrate above 95-100mph and not rated for speeds that high. They are known to explode above those speeds. There is a reason they set the factory limiter to 98 mph.

I'd go with a built steel shaft. And the front driveshaft should be a steel unit and I haven't heard of any problems with those ever.
From what Ive seen mph that critical speed is reached (affected by different factors) seems to be more toward the 125 range.

Also, I would NOT select a steel shaft in this long of an application. One easy way to lower critical speed is to increase mass.

Originally Posted by FFDP
It really doesnt matter if it's in a 2wd or 4wd truck. The aluminum metal thickness is still the same and they still run the same diameter driveshaft. Just the length is different but with these it's not going to make them any stronger.
From what I've seen 2wd come with aluminum (longer) shafts and 4wd/awd come with steel shorter shafts. So yeah it does matter.

Originally Posted by 03sierraslt
FYI I now have a Big *** Alum one from Texas Driveshaft Specialist. 6" Alum, they rated it at like 2000lb tq from what I recall.

Take your stock alum one off and feel how heavy it is, it is a feather weight. Kinda scary.
6" dad gum Stock shaft is approx .06 thick. Most aftermarket aluminum shafts are around double that at .125.

Originally Posted by vettelovralexand
It does matter because the transfer case makes the 4wd shaft shorter than the 2wd which impacts critical speed of a shaft considerably.
Smart man

Originally Posted by FFDP
If you say so.
You'd get further in life if you knew when to shut your pie hole and listen.


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