JIMNLIN wrote:
Actually a full floater axle shaft does not carry weight which is the subject being discussed with the OP... not the axle as a unit. The F250 gasser gets a smaller axle shaft diameter than the F250 diesel which is also what I was responding to with the OP.
The OP F350 srw has the same axle diameter as the F250 with the diesel. So he is thinking right about the larger axle shaft diameter being a better choice when running those larger diameter tires when he goes off road and has to hammer it.
Your just confusing yourself and the discussion further.
First, the guy we're talking about now is NOT the OP.
Second, you're correct that the axle shaft doesn't carry weight, BUT you are equating weight carrying capability, in your words "rawr" with the axle's ability to transfer torque and not break (axle shaft size). Those 2 things are semi exclusive of each other.
Third, the guy we're talking about has a gasser and is talking tires that are only modestly larger, like 1 tire size larger than what is offered stock on those trucks. Not enough snort to twist an axle on a F250 under virtually any possible condition, much less the admitted less than extreme conditions and way less than extreme power of a stock 6.2.
Yes theoretically bigger is better, but considering that the current setup is nowhere close to it's limits, bigger is of zero net return.