Bolting the Front Crossmember

[BRENT in 10-uh-C]

So to muddy up the water a bit, why the need for Loctite? Over time the frame will twist & flex, and just as Marco has said, there will be subtile squeaks ...but why the squeaks? The obvious answer is because the bolts are loose but is it because the nuts backed off, or because the fastener has stretched? My thoughts are that the fastener has more likely stretched but I would like to hear your thoughts.