XLR8R

So the aluminum driveshafts began with the 6.7Ls?

Anyone swapped out the steel ones from behind their 5.9L for one?

mega-engr

I'm not sure if it has to do with the 6.7 or not. I think I've seen steel or aluminum depending on the application. My 2007 MC has an aluminum on and I thought I saw pics of a QC (in a skid plate thread) that had the multi-piece steel one...

SolarYellow05

I was at the dealer the other day talking to my friend that's the diesel mech and he had a shaft out of a 5500 truck and it was definitely not aluminum. That thing was HEAVY and rusted.

Most drivetrain or heavy truck shops such as fleetpride will retube a driveshaft for $100 or less.

ptgarcia

Are you sure about that? I just looked at mine and my '06 Megacab 4x4 has a two-piece steel drive shaft.

mega-engr

That's exactly what I was talking about. Mine DEFINITELY has an AL one and it is huge. I've seen the same with yours... So maybe it is a 6.7L thing...

XLR8R

Could you measure the OD for us?

mega-engr

Hey no problem, except that I took the truck in today for CEL and probably won't get it back until Friday...

I would guess that it is something like 6" diameter or so.

XLR8R

All I know is - I want one...

mega-engr

Definitely goes with the BEEF of the rest of the truck. Looks oversized and strong as heck. Maybe more prone to bashing type of damage though? I read the alloy stamp as 6061 on the tube which is aircraft grade... Not cheap.