Slots & broken wheel studs

[ransil]

I put a set of slots on year or 2 ago I have now found 2 broken wheel studs, one was I was checking the tightness of the studs and one just broke with slight pressure, the other I just found in the garage laying next to the wheel, both are from the rear 1 each side. stud is inside the lug nut

wrong studs?
wrong lug nuts?

lugs are Mcgard 62000 slots say M&T I think on them
studs came with the axles Yukon 5 plus years ago

 

[Scoop]

Do your slots use tapered nuts or sleeve type nuts? Most vintage slots take these:

 

[tinytim02]

Here's a pic of the tapered style. I used these on my factory Ford slots.

 

[Broncitis]

Were any other lugs loose?

Years ago on by first built Bronco I broke off studs when the lugs got loose on the way from out near your place to Dillsburg on the maiden voyage with the new lift, wheels and tires.

Ruined a brand new forged MT wheel and had to get a motel in Breezewood until we could get it fixed the next day.

 

[Viperwolf1]

I think I remember casadejohnson having that happen a few years back.

 

[Madgyver]

I lost a wheel earlier this year while driving with slots, Those mag lugs only gave me problems so I sold the slots for $100. set of 4. Good riddence...

 

[ransil]

i use shank style nuts

the MCgard 6200 are the shank style
http://www.mcgard.com/Applications/AutomotiveSearch/default.aspx?QToK=PuHw8KxyvAaxOdPC860ucQ==

when I ordered them I measured the thickness of the wheel and ordered the size it suggested.

I check lugs all the time before they are / were tight the one broke when i was tightening it almost no torque applied just broke using a ratchet, i never use an impact installing them.

also when installing I tightened them in steps.

I would like to change the shank style to taper but can't find anyone to do it locally.

 

[bmc69]

You piss someone off maybe Randy? Better inspect all your brake lines too.

 

[Broncitis]

You piss someone off maybe Randy? Better inspect all your brake lines too.

Randy can have that effect on people! :-X;D

 

[Apogee]

What did you torque your studs to and what type of torque wrench? Did you install the nuts dry or did you lube them with anti-seize or any other lubricant?

I've lost a wheel once on my F150...apparently I torqued 3 out of 4 wheels and can't reliably count higher than that. The loose wheel made it about 2 hours up the freeway until I had to choose between hitting a pothole with the truck or the 8x12 trailer I was pulling...I chose the truck and it was a bad choice. Not two minutes later, I had a weird vibration whenever I lifted off the gas which turned into a massive vibration in the 30 seconds it took to get safely to the shoulder. I got it stopped, walked around the rig and there was a pile of aluminum shavings in the left rear wheel and two lug nuts clinging to half a thread each, one of which fell off in my hand when I touched it. Three lug nuts were missing, along with the wheel studs.

 

[ransil]

What did you torque your studs to and what type of torque wrench? Did you install the nuts dry or did you lube them with anti-seize or any other lubricant?

I've lost a wheel once on my F150...apparently I torqued 3 out of 4 wheels and can't reliably count higher than that. The loose wheel made it about 2 hours up the freeway until I had to choose between hitting a pothole with the truck or the 8x12 trailer I was pulling...I chose the truck and it was a bad choice. Not two minutes later, I had a weird vibration whenever I lifted off the gas which turned into a massive vibration in the 30 seconds it took to get safely to the shoulder. I got it stopped, walked around the rig and there was a pile of aluminum shavings in the left rear wheel and two lug nuts clinging to half a thread each, one of which fell off in my hand when I touched it. Three lug nuts were missing, along with the wheel studs.

Didn't use a torque wrench just a ratchet or breaker bar. They were all tight, I did not miss a wheel. these were on for 2 years and I have checked them multiple times.
I'm sure I used anti seize I used it on everything.

I'm familiar with what happens with loose lug nuts looks like 2 hours is the max distance for them to fall off as I did the same thing on my trailer a few years ago and it broke all the studs and egged out the rim, so after that incident I'm pretty consistent on checking lug nut tightness on everything I own before a trip.

 

[Apogee]

Didn't use a torque wrench just a ratchet or breaker bar. They were all tight, I did not miss a wheel. these were on for 2 years and I have checked them multiple times.
I'm sure I used anti seize I used it on everything.

I'm familiar with what happens with loose lug nuts looks like 2 hours is the max distance for them to fall off as I did the same thing on my trailer a few years ago and it broke all the studs and egged out the rim, so after that incident I'm pretty consistent on checking lug nut tightness on everything I own before a trip.

Use of anti-seize or any other thread lubricant means that when you tighten the lug nut, you're getting more stretch per ft-lb of torque. The amount varies depending on the wheel stud finish and condition, but +10% seems to be a pretty good estimate, so you should be de-rating the wheel stud torque spec by that amount. Since you're not using a torque wrench, that would be the obvious suggestion to avoid having this happening again in the future, or at least have more information should it repeat.

I've seen a few guys who just "oomph" their lug studs and had the opportunity to check with a torque wrench afterwards...most were big boys and were over tightening by 20% to 30%.

I know what you mean about checking wheel studs...I'm a bit OCD about it now.