Home' Australian Automotive Aftermarket Magazine : Australian Automotive Aftermarket e-Zine - Perf 16 Contents The chassis’ operation is often hidden from view,
so in many instances, damage can only be
discovered in the automobile repair workshop.
Vehicle safety is quickly compromised,
particularly whenever the chassis components
are worn. The experts from ZF Services therefore
recommend that workshops regularly carry out a
chassis check on every vehicle.
If problems are identified during this check,
these need to be pointed out to the owner and
immediate action should be taken. Abnormal
handling and unusual noises are often indicative
of faulty chassis components.
It is not always the shock absorbers that are
affected though. Other chassis components such
as the ball joints on the tie rods or the
suspension strut mounts in the suspension strut
dome are also subject to natural wear. Since
many of these components involve sealed units,
the signs of wear can only be seen once the
component has been removed from the vehicle.
As an important axle-mounting component, the
suspension strut mount connects the body to the
chassis. Unlike the support bearings on the rear
axle, the suspension strut mount has to be able
to turn in order to facilitate the steering and
rotational movements of the suspension strut.
To this end, a rubber-to-metal component tends
to be used on volume production vehicles, with
a rolling bearing fitted in the center. The metal
ensures the necessary stability, the rubber takes
care of the required flexibility, and the rolling
bearing ensures the rotatability.
When the natural wear of the suspension strut
mount exceeds a certain point, the steering may
become unsafe and cornering may feel spongy
and unstable. Cracking sounds can also often be
heard. At this point, it is high time to take a close
look at the chassis.
When removing chassis components, every
workshop professional will be aware of the large
amount of work involved. Depending on the
vehicle type, it may be necessary, for instance, to
remove the suspension strut, move the stabiliser
out of the way, and separate the shock absorber
and steering knuckle from each other.
To replace a faulty suspension strut mount, the
suspension strut will need to be taken apart.
However, this effort is worthwhile as it means the
driver is then safe and comfortable on the road
The tie rods are also candidates for wear in the
chassis. The ball joints on the tie rods suffer with
every small bump as the wheels hit the curb,
every pothole, and every time the vehicle moves
onto the road shoulder. The tie-rod ends, for
instance, can wear out over time – without the
driver noticing anything at first. The upshot may
be compromised axle geometry and unstable
If the workshop professional notices problems
with the tie rods or associated ball joints, action
needs to be taken immediately, just like with the
worn suspension strut mounts.
If they are replaced in good time, new suspension
strut mounts and/or new tie-rod ball joints will
enhance safety and ride comfort. Replacing
these components can also help prevent
expensive repairs down the line.
Most customers appreciate the expert advice
provided by their workshop. Repairs to steering
and wheel suspension components therefore also
took top slot in the DAT Report for 2014. Experts
from ZF Services also recommend using OEM
quality products for replacements.
Like all spare parts from ZF Services, the
Lemförder chassis and steering components are
tailored exactly to the respective vehicle and thus
retain the vehicle's original quality.
In the spare parts market, there are also often
offers of secondary quality products that have,
for instance, a different material specification.
However, the part manufacturer cannot verify
what effect this has on how this particular spare
part operates in conjunction with the other
vehicle components due to the lack of
specifications from the automotive manufacturer.
Ultimately, the driver has to accept the possible
risk of reducing the service life of the other
With more than 13,000 steering and chassis
components for passenger cars and commercial
vehicles, the ZF Services brand Lemförder is
already a well-established partner in the spare
For more information visit www.zf.com
PREVENT DAMAGES TO YOUR VEHICLE
ZF recommends regular chassis safety tests
Pedders Trak Ryder Ezi Fit Spring and
Pedders Trak Ryder Ezi Fit Spring and Shock Kit,
Part Number 807113, are an alternative to
having to buy separate components when
replacing your Jeep Grand Cherokee WK2 model
The coil spring has a very large amount of
tension (over 800kgs/in) when assembled, so by
fitting the Pedders assembly, this eliminates the
need to buy separate components that would
force you to compress the spring and fit the
shock, spring and/or mount individually together.
According to Pedders, installation time and the
safety of your staff are the key benefits from the
TrakRyder Ezi Fit product as the spring, shock,
bump stop and shock mount are all supplied pre-
• Supplied as a matched set of pre-assembled
suspension components including Pedders
Shock Absorber, Heavy Duty Spring,
Bumpstop, Boot Kit and Strut Mount
• Reduced installation time as the components
are supplied pre-assembled and ready for
direct fitment – no need to use the spring
• Individually shock dyno tested for quality
• The Pedders EziFit 807113 kit can be
installed as a replacement to the factory
suspension units – this enables the vehicle
to be returned to its original ride height
• Pedders shock absorbers included in the
EziFit kit are made from heavy-duty twin-tube
construction technology and heavy-duty
reinforced double-welded mountings for long-
• Rugged multi-purpose design improves
stability and ride comfort for touring, load
carrying, towing and 4wd applications
For more information visit www.pedders.com.au
AAAM FEB 2016 PERFORMANCE - BF:AM MAGAZINE SHELL 16/2/16 9:46 AM Page 22
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