Front suspension component clearance with the D40 Frontier is of great
concern when modifying the vehicles due to the overall design of their front
suspension. To make matters more complex, production variances from Nissan
on the factory upper control arms and upper coil buckets leave clearance at
even more of a premium on some vehicles. From the factory, the upper control
arms and upper coil buckets are stamped pieces of steel. The finished
stampings have a "lip" of material that is left around the outer perimeter
of the workpiece. This lip is then cut to allow for fitment and final
installation on the frame from the factory. Variances in the widths of these
outer edges can contribute to clearance issues beyond the overall tight
design of the front suspension. This variance is largely to blame for the
difficulty in determining beforehand whether or not a vehicle will suffer
from the common "clunk" sound that you've undoubtedly read or heard about
when the upper control arms makes contact with the coil bucket at full droop
once a suspension lift has been installed.
We designed the NP17570 D40 Frontier Heavy Duty Upper Control Arms to not
only address these clearance concerns, but to offer an upper control arm
that is much stronger than the factory unit to sustain the rigors of
off-road driving and can be easily maintained and rebuilt over time as
needed. Essential to this strength and rebuildability are the CALMINI
proprietary ball joints that are included with the control arm set. The ball
joint offers a double shear mount that we feel is necessary for proper
long-term functionality and safety.
The NP17570 D40 Frontier Heavy Duty Upper Control Arm Set will yield
additional upper control arm-to-upper coil bucket clearance on your vehicle.
However, due to the aforementioned factory component variances, please be
advised that trimming of your upper coil bucket may be necessary to allow
for proper clearance of our arm set (in particular, the area around the ball
joint boot).
If you have any questions please let me know.
Thank you,
Justin
CALMINI Products