< blown shaft /twisted . .

 

Two quick questions on this:

1) Is this problem only on crew cabs, or is it a general problem amongst all NNBS pickups?

2) If you were to take a bone stock pickup and do nothing else except tune away the speed limiter, and then travel in excess of 100mph with this otherwise stock pickup, would the OEM driveshaft be just as likely to blow apart on it, as say a highly modded pickup with gobs more power than stock?

 

high speed balance the factory shaft for starters, they are balanced from the factory to match the speed limiter on the truck, and therefore shake above that and can
break.
by the cost of the plans for the rest of the truck, a built shaft may not be the end of the world though.
2wd shafts seems to have more problems as they are longer[ no trans case]
my 2wd 07 nnbs had a 96" one piece shaft and shook on the dyno in 3rd gear

 

I just took out one on a NNBS CC, while tunning. Started to vibrate right at 100 mph, then I let go of the throtlle, then . Scared the **** of me and the owner. This also seems to be more of a problem on the 2wd crew cabs. I would go ahead and get a built one, save you a head ache and the possibility of damaging other stuff or an accident.

 

My drive vibrates at 100 to 105 and the then line itself out had it to 126. Since reading this post set the limiter back to 90 it an 08ccsb

 

I have been on many that do just that.
But this one did not hold.....

 

Where's the best place to buy a built driveshaft?

 

Denny's is good for mailorder, Inland Empire Driveline in California....best to find someone near you, though.

 

This is a resonance issue that really should be addressed, especially if you plan on more power later. Check your pinion angles.

 

well mine' i had 2 vibration at all . . over 100MPH< i guess 135 MPH . . it's all that OEM driveshaft can handle . . .