The springs here on the right are the really heavy duty springs, may not
look like it is much bigger but the diam of the HD springs is larger. They
are solid riding springs. I collaped 3 sets of the standard stock spring
with in a year. One set was within two weeks. I know I am not that ruff
on my truck, but.... With my new heavy duty set of springs I am able to
maintain the 16 inch clearance on the front end, unlike the stardard ones
on the left that also allowed the ride side tire to hit the air filter
that in turn hit the hood and cracked it a little..
Standard Spring - Before
Heavy Duty Springs
Front now with the clearance of 16.75 inches, before it was just at 15
inches. The rear clearance is at 19.25 inch. The clearance is taken from
the cross bars front and rear.
Front @ 16.75"
Rear @ 19.25"
How to take the measurements:
The Above springs are of 94 Hummers.
Set tire presure, front 26 PSI, rear 28 PSI.
Position vehicle on hard flat level surface.
Remove all load.
If you have added a winch or aftermarket brushguards, may invalidate warranty
replacement of coil springs.
Bounce front and rear of vehicle up/down several times to make sure it
is fully settled.
Measure the distance from edge of each lower control arm front crossmember
bracket to shop floor.
If distance is less than 16" and/or if the left and right side measurements
differ by more than 3/4", then warranty will replace springs, If vehicle
is covered by original warranty and has not been modified.