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My steel shaft that came with the 8.8 is vibrating. I've heard because it is the small diameter and is not using the original yoke that has the damper on it. So I threw the stock aluminum drive shaft in and since the vibration is gone, great.
Problem is, I know I'll have to baby it at the track. No man launches. So, from bone stock on radials 6 speed 3.42s to 8.8 swap 4.30s on ET streets with suspension and sub frames, I won't know the best results but I'll report back after the track to report if I broke the stock DS.
I bet it holds better than you think. If you decide to go all out, you could do a carbon fiber DS. Very strong and light so no vibes. If it breaks, it'll become a high speed broom and clean your undercarriage.
Well, for the current wallet situation and trying to put a new engine in my 2004 3/4 ton, I'll say it is not currently a option but a chromoly would be great.
Chrome Moly is great stuff and very strong - but still just a higher grade of steel, so it's heavier than aluminum, and therefore still more prone to vibrations.
There are some other guys on here who are running much stronger builds than I am and still using aluminum for their drive shaft.
05-24-2015, 11:02 AM
Stock aluminum drive shaft 
