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how to cure rear sag?

1453 Views 6 Replies 5 Participants Last post by  astro355, 
THE MUFFIN MAN
i use an astro for auto detailing, carrying about 100 gallons of water, the rear doesnt sag much, but some. what is the best/cheapest way to lift the rear a few inches to help cure this?
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AstroAustin
You either have:
Steel, there are several metal springs stacked on top of the axle.
-or-
Fiberglass, a single spring (mono-leaf) that is made of high-density fiberglass and has a plastic looking outer shell.
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