Magnum studs? (1 Viewer)

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I've wheeled my truck pretty hard.
I did a trail called Cat Canyon, which is a 4+ rated trail here in Utah. The year we ran it, it had taken a HELL of alot of water and had changed considerably from years past when the club has run it. My truck was on the shortest tires of the bunch that completed the trail (we had an FJ62 running 33's but he turned around about 1/4 the way into the trail). All of the other rigs were running lower diff gears, 37" tires (or larger) and upgraded axles (either longs or dana 60s). I Drove my truck to the trail. I drove my truck home. I had no failures, but I did get a ton of body damage.

My Land Cruiser ran the stock 1976 FJ40 knuckles, birfields and 35" tires. No Smurfields, no Longs. No upgraded studs. Before I ran the trail, I went over the entire chassis with a torque wrench. Anything that moves, I checked to make sure the fasteners were snug and properly torqued. All spring pins and shackles were at the proper torque. Steering knuckle stud torque was checked @ 75 ft/lbs. I actually got the idea from Woody.

Again, I ran the trail with no failures and then drove the rig home the next day.
10 minutes with a couple of wrenches and a torque wrench is all it took and the rig performed flawlessly.
 
they don't increas clamping force, that is the same based on the torque of the nut. they increase shear force, and that is based on the strength of the bolt itself. and I believe that the king pins are the same size, as they have to fit in the inside diameter of the toyota trunion bearings. is that different?

The arp studs require more preload torque as I recall = more clamping force :)

The trailmart arms use a .25" smaller pin where the kingpin goes in the arm. There have been multiple threads about people breaking this part on pirate, normally they get deleted because of certain political implications.

Wasted a Six Stud - Pirate4x4.Com Bulletin Board
 

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