Not sure I agree actually... The way I see it the tires will spin at whatever force is needed to spin them... A crawl box would allow a higher engine rpm to turn at at lower speed but that's it... The force to spin the tires is always the same... not making anything harder on the driveline... now I guess if your tires are in a locked up not moving position then it would be more force on components since the other end is froze... but since tires almost always spin that shouldn't be a problem...

I probly didn't make sense but that's how I see it... lol

 

Torque is multiplied to the wheels. At any rpm, there is more force on the wheel. The only time it would have less force would be under 0 load.

 

Breaking bolts loose.
Stock gears and over size tires = little stubby wrench.
Crawl box/doubler = 2' breaker bar.

Which is easier to break things with?
You go slower with the breaker bar, but you apply more force.

 

If the bolts welded yes... but apply that to say a bolt with a lock nut and no wrench on the nut

 

I would say its easier on the r&p to crawl than hammer down.
Harder on the shafts though.

 

Hammering down is irrelevant. Always easier on parts to idle through instead of flooring it.

With the same throttle input , more torque is applied to the r&p and the shafts when in the lower tcase gearing range

 

I see. I guess I am messed up in my views.

 

Anything down the line after the tcase is affected by the tcase gearing

 

I know this. I'm saying wouldn't t case gearing be easier than all axle gearing?
4:10s in a dana 30 w/ c box, compared to 4.88 and 2.72:1?

 

You'll see more torque multiplication from adding a crawlbox than going from 4.10-4.88

Or maybe I'm not understanding the question here

 

Wouldn't it be easier on the ring and pinion with the crawl box than the 4.88 do to their being more teeth on the pinion?

 

In a d30, maybe because of the contact patch, maybe not. Really hard to know 100% without testing.

Although, theoretically 4.10 would have an easier time surviving a crawlbox than a 4.88, atleast teeth wise.

 

This is what I was trying to get at and failing.
Dana 30s are weird.

 

Lower T-case gearing will put more load on everything. Shafts, R&P axle shafts etc. Axle gearing puts more load on axle shafts.
From 4.56-4.88 looses a pinion tooth. This is where the perception of the weaker gear set comes in with the 4.88's. IMOP the ring gear will break before the pinion tooth if setup properly either way.
Im not following the analogy of the locknut and no wrench.
I guess in relation to load? Which is the only variable on the drivetrain. If you were able to only apply the same load with deeper t case gears as without than you would never really apply more force. But this isnt really possible. The problem is that you cant tell. It feels great and crawls and you have no idea that there is a TON of force on everything. Then it slows down, and you give it a little more throttle, maybe with stock gears it would be bound up, but there is no way to tell, so you throttle a little more, then snap. Stuff is broken.
The reason you can "crawl" stuff, and idle over stuff is because you are generating more force than with lower gears and more throttle input.
So in most situations, you are applying more force to everything that you normally would.

 

Can you torque a loose bolt?