"...I really don't see the need to torque U-bolts, spring bolts, or any of that. I think those things can't get tightened ENOUGH!"
No offense, but that mentality can and WILL kill people. In aviation, the torque wrench is one of the most frequently-used tools in the toolbox. Why? <font color=red>Because improperly torqued fasteners can and will break at the worst possible time!<font color=black> The most common cause of fastener failure is OVERTIGHTENING.
Let's think about this... U-bolts and spring bolts. They keep your axles located under the truck, they support the weight of the truck, they transmit all the forces from the axles to the rest of the vehicle. You decide that you'll throw the 3ft. cheater bar on the ratchet when you tighten your spring bolts. You've torqued that bolt way past it's design specification, putting stress on it that it was not designed to take (not to mention the stiff ride and lack of flex of that spring bushing). You hit a pothole at highway speed, creating a huge amount of force that bolt has to endure. It's already under more stress than it's designed to take from being overtightened, so it fails catastrophically (breaks). Now you've got an axle/spring assy. only being held in place by 3 bolts, rather than 4. Now the axle has much more freedom to move around on its own, possibly causing you to lose control and wreck, possibly injuring or killing yourself and anyone else unlucky enough to be nearby.
Stuff like this DOES happen. In Marine Corps aviation a few years back, there was an F-18 that had a serious flight control system failure in flight. The pilot managed to get the aircraft back on the ground in one piece, and the engineering investigation that followed revealed that a bolt holding one of the flight control actuators (basically a big hydraulic ram) sheared. The cause of the sheared bolt? <font color=red>
IMPROPER TORQUE.<font color=black> A brand-new mech had been told by an older mech that he didn't need to use a torque wrench, "just use the big breaker bar and stand on it".
Almost ANY torque wrench is better than guessing. I'm using a $25 one I got from Pep Boys. I certainly wouldn't build an engine/tranny/axle with it, but it's fine for lugnuts, brake bolts, etc.
As far as Snap-On goes, we only had calibration problems with ours if they had been dropped or abused. I once caught a new kid using a Snap-On 3/4" drive ratcheting-head TQ wrench (about $800) as an improvised slide hammer. When it wouldn't calibrate within specifications anymore, it became an $800 3/4" ratchet...
If at first you don't succeed, failure may be your style...
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