Are you talking about the axles or the drive shaft from the trans to rear diff? With switching to a one piece drive shaft there are positives and a couple negatives. The good, less rotational weight so you'll get a faster rev and more power to the rear. Not much that you'll notice. Also there are less parts to break. The bad, you'll feel more vibrations. I did with the one piece aluminum shaft in my Supra. Another is make sure you get the strongest ujoints available because with 4 ujoints your spreading the forces and load through 4 verses just 2 joints.
When it comes to upgraded cv axles I don't bother and the reason is once you install stronger axles you'll break the next weakest link. Next in line would be the trans and its much cheaper to buy axles then buying a transmission. A friend of mine had a SRT 4 Neon with about 350whp and he broke 1 axle in 3 years (imo pretty good) so he decided to get the strongest axles sold, I think they were a stage 3 or 4 axles. His first trip to the track and second run anti-legging and then the green stage light BOOM! His trans blew up cracking the cases. He didn't want to listen but since he switched back.
Last edited by spooln30; 02-11-2013 at 01:54 AM..