i've been running dual shackles and 63's on my truck for years. was a daily driver up til about 2 years ago. never had any problems with the shackles "unloading". its not unstable at all. its actually very stable with or withough a loaded down bed. thanks for posting up a pick of my truck jrock. driven lots of trails, up hill, down hill to the point where i was dragging the front bumper it was so steep and never had any problems with it. know lots of people who run them on dd's and never heard anyone say the "unload" or be "unstable". just my 
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Never had any problems? I've known a few people that have had them seperate when you least want them too... maybe they didnt have them tight enough? how tight do you have your shackle mating bolt?
