About DANA

[valyidol]

I have on Suburban here such Axles. I think thet they DADA 44. My friend speaks, that they bad. The Axle Shaft can break and I'll lose a wheel. It is the truth?

[Engineer]

Front is a GM corporate 10-bolt.

Rear is a GM corporate 9.5" semi-float 14-bolt.

And yes, if you break a rear axle, off comes the tire.

Neither axle that you have is made by Dana.

[Blazin]

Front is a GM corporate 10-bolt.
Rear is a GM corporate 9.5" semi-float 14-bolt.
What Engineers said X2.

Both of those axles are built by American Axle Manufacturing for GM.
They are both very good axles for stock to 33" tall tires when used moderate to hard. They will handle 44" tall tires if you don't wheel the wee outa your truck.
I have broken axles in many 10 bolts, and their Dana counter part the Dana 44 plowing, and wheeling. But have also ran the heck out of them before they broke. If you break a front axle your wheel is not going to come off unless its such a catastrophic break that it takes out a ball joint, or two!
I just recently broke a rear axle in a semi float 14 bolt, but when I did it I had over 10,000 lbs. on a trailer behind the truck. I couldn't quite make a buddies muddy driveway, I got almost to the top of the hill and was just spinning, he hooked on with his K30 dump. When I let the clutch out it went bang. Oh yeah, the axle I broke I'm pretty sure was original, had over 230,000 miles on it.
You can break any axle if you put your mind to it.
What are your plans for this truck?

[bake74]

     As both Engineer and Blazin said, yes those axles can break, but as Blazin said you can break any axle.  Are you planning on hard wheeling this truck ?  If not those axles should last you just fine. 
     Oh course as soon as you abuse them they more than likely will go.

[valyidol]

Front is a GM corporate 10-bolt.
Rear is a GM corporate 9.5" semi-float 14-bolt.
What Engineers said X2.

Both of those axles are built by American Axle Manufacturing for GM.
They are both very good axles for stock to 33" tall tires when used moderate to hard. They will handle 44" tall tires if you don't wheel the wee outa your truck.
I have broken axles in many 10 bolts, and their Dana counter part the Dana 44 plowing, and wheeling. But have also ran the heck out of them before they broke. If you break a front axle your wheel is not going to come off unless its such a catastrophic break that it takes out a ball joint, or two!
I just recently broke a rear axle in a semi float 14 bolt, but when I did it I had over 10,000 lbs. on a trailer behind the truck. I couldn't quite make a buddies muddy driveway, I got almost to the top of the hill and was just spinning, he hooked on with his K30 dump. When I let the clutch out it went bang. Oh yeah, the axle I broke I'm pretty sure was original, had over 230,000 miles on it.
You can break any axle if you put your mind to it.
What are your plans for this truck?

My plans for this truck - long travel on highway with family and luggage, driving in mountains, sometimes  muddy driveway, driving on country roads. Sometimes with a trailer.
What axles is better for these objectives? 14 bolt?

[valyidol]

If I'll put on these axles of a wheels 34-35 ' will it they sustain?

[Irish_Alley]

its nothing to lose sleep over. unless you have a 14 bolt ff just sitting with matching gears

[valyidol]

its nothing to lose sleep over. unless you have a 14 bolt ff just sitting with matching gears

That is I can sleep easy, isn't it?

[Blazin]

They will be fine for what you are doing as long as they are in good working order now. Check the axle, and pinion seals for leaks. If they are not leaking I would drain the gear oil, and refill with fresh for piece of mind.
If they are install new seals and fresh fluid.

[bake74]

     As Blazin said, if that is all you are planning on doing with your truck, your axles should be fine.

[valyidol]

Thanks! And what about Weels 34-35'?

[bake74]

Thanks! And what about Weels 34-35'?

     You mean tires ?  I do not remember if you said if it has a lift or you plan on a lift or you are leaving stock ?  If stock, 34" or 35" will more than likely hit the fenders when you turn into say a uneven driveway or parking lot entrance where your vehicle will lean to one side.  33" tires do this on my k10 when it was stock, the springs were probably a little worn though. 
     Just be prepared for this if you put bigger tires on.  I believe stock tires where in the 31" - 32" size.

[Blazin]

Those axles will handle 35" tires, but not if you do any hard core wheeling. Trail riding they will live.

As Bake said if you don't have a lift 33X12.5s will slightly rub the fenders when you turn and drive over uneven surfaces. 33X9.5s would fit without rubbing unless you completely compressed the suspension while turning the wheel hard.