Damn lugs.

[alwaysFlOoReD]

I swapped winter tires onto my work truck, a 2006 Dodge Ram 1500. I torqued the nuts to 110psi to start, and was going to finish at 135 as stated in the book. Sheared off a lug at 110! Not sure how that happens? Perhaps someone previously over tightened it. Now i have to fix the damn thing...and the snow finally started sticking a couple days ago and i have no shelter to work in. Woah is me...lol.

 

[CrabGuy]

That sucks. Do you need to pull an axle to swap it? Might be a good idea to replace all of them if you suspect the others have been stretched. Working in the cold is no fun at all. I keep a smaller bearing press I've only used only a few times but it's saved me so much frustration, especially with ball joints on my old 4WD Super Duty

 

[JohnnyO]

Not sure how that happens?

The stud is 15 years old.

 

[sgtsandman]

I’ve never met the OP, so i don’t know if you can call him a stud and I’m sure they he is older than 15.

 

[Roert42]

I did this on my ranger while swapping tires. Except I broke the stud pulling rusted on lug nut off with an impact. Luckily I ordered the wrong size lug stud, it was just a hair shorter then the right ones. Did not have to pull the axel.

 

[19Walt93]

I swapped winter tires onto my work truck, a 2006 Dodge Ram 1500. I torqued the nuts to 110psi to start, and was going to finish at 135 as stated in the book. Sheared off a lug at 110! Not sure how that happens? Perhaps someone previously over tightened it. Now i have to fix the damn thing...and the snow finally started sticking a couple days ago and i have no shelter to work in. Woah is me...lol.View attachment 68932

That looks like an awful small diameter stud to hold 135 ft/lbs. Are you sure it's right?

 

[alwaysFlOoReD]

That looks like an awful small diameter stud to hold 135 ft/lbs. Are you sure it's right?

Stock lug and i looked in the owners manual for the torque specs....
I thought it was high too.

 

[85_Ranger4x4]

Doesn’t have the 8 lug truck in there too does it?

 

[snoranger]

Id be happy that the stud snapped when it did... I’d much rather a weak stud snaps while I tighten it sitting in the driveway, than it snaps driving down the road.

 

[scotts90ranger]

Yeah, been there, done that... lost 6 lugs on the same tire on the F350 with the camper in the bed while towing... not a good feeling... mine was from under tightening...

 

[Blue 92]

If you can and care to, post a clearer picture of that fracture face. Before retirement one of my jobs was doing failure analysis of bolts, and if I had a better look at the face I could maybe tell if it was a single overload fracture or the result of a crack that had been slowly growing and finally gave way when you were tightening.
PS, you said you torqued to 110psi, but that is a pressure not a torque - unless you are running 110psi into your pneumatic impact wrench

 

[alwaysFlOoReD]

If you can and care to, post a clearer picture of that fracture face. Before retirement one of my jobs was doing failure analysis of bolts, and if I had a better look at the face I could maybe tell if it was a single overload fracture or the result of a crack that had been slowly growing and finally gave way when you were tightening.
PS, you said you torqued to 110psi, but that is a pressure not a torque - unless you are running 110psi into your pneumatic impact wrench

Psi...oops...lol.
Ill try to get a better pic tomorrow. But there was no sign of rust that i would expect to see with a crack.

 

[Blue 92]

Yeah, rust is one of the things you see if there was slow growth, especially with carbon steel. The other thing you look for is a flat surface that has beach marks typical of fatigue. Here is a bike pedal that started cracking due to fatigue and finally failed due to overload, launching the rider and breaking his collar bone (thankfully not me). Take a look at the attached picture, the lighter surface is the fatigue crack, and you can see the beach marks as the crack started growing faster. The dark area was the meat holding the part together till it let go real fast.

 

[bobbywalter]

Bah ... You didn't need that one anyway

 

[alwaysFlOoReD]

Yeah, rust is one of the things you see if there was slow growth, especially with carbon steel. The other thing you look for is a flat surface that has beach marks typical of fatigue. Here is a bike pedal that started cracking due to fatigue and finally failed due to overload, launching the rider and breaking his collar bone (thankfully not me). Take a look at the attached picture, the lighter surface is the fatigue crack, and you can see the beach marks as the crack started growing faster. The dark area was the meat holding the part together till it let go real fast.

Yep, i see the beach marks.