Modernized
Air Suspension
Curing a 'Bags-Over-the-Axle Setup
By Mike Alexander
Photography: Courtesy of CanDo Specialties
Before
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With all the debate out there focusing on suspension
setups, we figured it was about time to put some suspension myths to
the test. For years, fabricators 'bagged trucks day in and day out using
a standard notch and bridge, with the airbags mounted directly on top
of the axle, and never really thought much about it. Well, times have
changed, and air setups have certainly come a long way. Lately, we've
been seeing systems designed with the 'bags mounted on link bars, giving
the suspension a mechanical lever advantage for lift, along with a better
ride.
After
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In the hard-core suspension world, some will tell
you that a reverse four-link is unsafe and by nature cannot function
correctly. However, CanDo Specialties in Oroville, California, put this
myth to rest. The CanDo reverse four-link was created about four years
ago with the help of Brian Jendro. It is designed to provide enough
lift so that you can remove the biggest rims you can stuff under your
mini without any complication. The kit has 10-12 inches of lift with
shocks properly installed and can be installed with the stock lowered
suspension in place. According to CanDo's spokesperson, "As long as
your setup is designed properly, keeping the pinion angle in check throughout
the range of travel, and installed correctly to avoid axle wrap, then
you're good to go." Brian Jendro pioneered this setup in the mid-'90s,
and it has been put to the test time and again ever since.
You can now easily 'bag your truck and maintain
ride quality. For this article, we focused on what it takes to build
a rear suspension setup that rides as good as it lays. This weld-in
kit is also currently being designed with bolt-in applications for
most mini-trucks. Follow along as CanDo installed its weld-in reverse
four-link, which has been tested to be "safe and reliable with more
than 60,000 miles on a daily driven truck to prove it." For more information,
contact the company listed in the source box.
This is a look at the
full reverse weld-in kit from CanDo.
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Each kit is handbuilt
in-house to ensure the utmost quality. First, the link ends
are measured out for the bushings.
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The link bar ends are
then notched.
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Every kit is then fully
TIG-welded for good looks and added strength.
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Steve and his crew started
by plasma-cutting away all the old suspension pieces welded
to the frame.
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The frame was then cleaned
up so it could be plated.
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Plates were measured, cut, and then welded
into place to restore strength to the stock frame.
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A rear crossmember was
measured out and then welded into place.
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Next, the spare-tire-holder
crossmember and remaining old suspension pieces were cut away
and added to the scrap pile.
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With all the old junk
gone, the top 'bag mount was measured, set up, then tacked to
the frame.
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All measurements were
triple-checked, and the lower link bar was tacked into place.
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The lower 'bag mount
was measured up and tacked to the lower link bar.
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The top link bars were
measured out and also tacked into place.
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With everything tacked,
the system was quadruple-checked for proper placement before
being permanently welded.
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A top bridge bar was
bent and fit into place to measure out where the shocks would
be placed. For this particular install, the truck would be body-dropped
3 inches, so the shocks were mounted to allow for a couple extra
inches of lift.
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Shock tabs and an air
tank mount were then TIG-welded to the bridge.
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Once the shock tabs
and tank mount were in place, the bridge bar was completely
welded to the notch.
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A couple of gusset bars
were bent and welded into place to support the bridge and clean
up the lines.
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To shorten the tank,
the mounts were cut off and shortened.
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Nuts were TIG-welded
to the bottom of the shortened mount, so the tank could be bolted
in upside down.
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Last but not least,
Easy Street 'bags were bolted up and plumbed with air line.
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The end result is a
smooth ride and no need to relocate the gas tank. It doesn't
get much easier than that.
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