Arizona Rock Crawler
- Thread starter starkey480
- Start date
That's the plan! It is on the horizon.
Oh wow, this is a smack down!
Haha, not meant in that way. Garrett just mentioned that there has been a few attempts at a trip down but for some reason has been cancelled each time and he hopes it comes to fruition.
I didn't break the 60, but proved that the 5x4.5 wheel studs pattern on my 60 is not adequate. On the front 44 I think I broke the locker but will have to open it up once I get it home. We are on our way back now and just stopped for night somewhere in Oklahoma.
I know, just jumping in on the fun. I wish I wasn't so far away, because I'd love to wheel with you all, Colorado Crew included!
If it isn't smack down, then I'm not going!
All 5 studs sheared. The tire was pinched really hard between rocks ( so hard that we had to let the air out of it and use hi lift handle as pry bar to move one rock to get tire free) and the engine lugged a little bit still had enough torque to shear them all off.
My Currie shaft only has the 5x4.5 pattern in the flange.
My Currie shaft only has the 5x4.5 pattern in the flange.
Oh believe me, there will be some smack talk happening. But it will all be coming from Garrett and his jeep on the trail and he will never even have to say a word.
Any engineers here wanna guess how much torque it takes to shear 5 studs? 
Any engineers here wanna guess how much torque it takes to shear 5 studs?
Loose lug nuts or tight ones? There is a difference in what happens with the studs. And the difference is an interesting one
Sure,shear by itself is one thing.gotta wonder what it takes to overcome friction and or stretch the studs/deform the wheel enough to lose clamping force.
Brianj5600
TJ Expert
Any engineers here wanna guess how much torque it takes to shear 5 studs?
Engineers don't usually guess.
That's unfortunate.
The bolt pattern options on RJ's rear Dana 44 look similar to my R&G axles (5x4.5 and 5x5.5).
But the bolt pattern holes for the HP Dana 60 axles all look closer to the 5x4.5. Do you happen to know if RJ offers 5x5.5 BP shafts for the HP Dana 60? I wondered about this last week when looking at their offerings. If not, I wonder if R&G offers something that would work for folks running 5x5.5 wheels.
In my full float HP Currie 60’s I have them in 5x5.5 with 5/8” studs so they are available.
Any engineers here wanna guess how much torque it takes to shear 5 studs?
I strongly suspect there is something else going on that caused them to shear off. There will be some smart folks along to correct my errors, but some basic math shows a few things if you can dig around enough on the internet.
A grade 5 1/2" bolt generates about 10,000 lbs. of clamping force. Wheel studs are grade 8 and about 50% higher.
A low pinion 60 ring gear can handle roughly 6000 ft. lbs. of momentary torque. HP is less in a rear application.
4340 chromolly shafts are good for about 9600 ft. lbs. max in good conditions.
I can't come up with any scenario where the shafts or the ring gear will not fail first before they shear off 5 properly tightened wheel studs.
Not even close to accurate in my 25+ years of experience. Most engineering involves educated guessing but guessing nonetheless.
