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If a driveshaft breaks, it's almost always at launch. That's first gear, so the driveshaft would not be spinning at 8,000 rpms. The driveshaft would not act like a sawblade and cut through the center console, either. While that would make for a nice special effect in a movie, it's not going to happen back here in reality. Most of the danger of a driveshaft breaking is that the part hanging forward of the rear diff can snag on the ground and pole vault your car. That's what driveshaft loops are for. I really don't believe that CF driveshafts are all that much safer than any other driveshaft. When is the last time you have heard of someone being killed by their driveshaft?
: As far as safer and better between the two. Well, sure the steel is stronger, little heavier. But the AL shaft is rated at 800lbs/ft Torque. So I cannot think of any tire holding that amount without spinning, even a slick. Bad side to the both of these shafts is, if such a break where to happen. You would be sitting right next to a steel or Aluminum saw blade. That thing will cut and rip right threw that center consol at some 8000+ rpms, because the less resistance from the rear diff, will send the rpms shooting way pass redline at the time of the break. Thus is the reason some spend 3 times the amount for the carbon fiber shaft. For it will only bust up into two splintered half's.
But like many after the first GB, I have never had one problem with mine. I post pro's and con's on anything I buy. If it sucks, I'll post it, if it's great I'll post it. This shaft is an only makes sense part. All the benefits are there, no center bearing to replace anymore, more TQ handing, more power to the rear wheels, lighter than stock by far ( 12lbs ). Here's an example of stock driveshafts on BFG drag radials on 15psi tire pressure, ( Not Slicks ). Even thought this is a Supra TT's shaft ( only BPU ), the affect is still the same for us. :  :  : That was a RPS Stg III clutch, BFG's and a 6000rpm lanuch. : Here the part number on Z tt AL shafts : 3191-504A ,,,,,, I think it was the 3191-504 ( no A ) was the first shafts made with the problems. : Powertrain Industries INC
: 1(714)893-4585 : [ http://www.powertrainindustries.com/cp0001/nissan_components.htm ]
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