I dorked around with my torsion bars trying to level out the ride
(side to side), and I can't quite get the feel I want. I may have
got lost in the adjustments.
Is there a procedure out there on how to initially preload the
t-bars and set Z-height?
The truck is a '04 Silverado SS - but I'm willing to hear anything
on any full size GM chassis.
I also want to note that from the factory, the drivers side adjuster
was a good 3/8" further out, than the passenger side. The bump stop
was also kinked in it's little cup, which made it sort of slip off
to the side on the lower control arm. I fixed that, and it feels like
the drivers front is MUCH stiffer than the passenger side.... like I
need to pull even MORE of the adjuster bolt out.
Does this sound right?
Bringing it to the dealer is a last resort for me.
Since you fiddled around with the torsion bars, you
might just as well take it into a shop and have them
set the z-height for you and perform an alignment.
You can't just adjust the torsion bars up and down
without doing an alignment. The ride height must
be done before an alignment, because changes in
ride height will affect the alignment.
z-height is 4.3-4.8" on your truck, but I can't really
explain where the measurement is taken....you really
need to see the diagram that is in the service manual.
That's what I'm really considering right now...
I'm just nervous that they'll set it to something
that looks good parked, but rides poorly. That's kind
of what I'm trying to tune out now. The truck seems to
favor leaning to one side over the other, once out on
the road. It doesn't follow the camber of the road
I initially started off with a half turn tweak on the
driver side to bring it back up. (that side was sagging)
Then it snowballed from there...
Thanks - that's good... I have a diagram at home that I got
from the dealer, who pulled it off of some official locked
down GM service tech site a while back.
It says to measure the height difference from something like
the lower control arm pivot, to the centerline of the lower
ball joint - or something like that. I don't have it in front
I'm going to have a real hard time getting to the dealer
during their service hours, so I was hoping I can fudge it for
a few weeks. A half inch difference in Z-height is a bit too
much to fudge though...
Are you saying here that the truck "pulls" to
one side? I was under the impression that
you were simply concerned with the truck
leaning to one side when it's just sitting still.
If you are instead talking about "pulling" while
you are driving down the road....tweaking
the torsion bars is the wrong way to adjust
for a "pull". It is possible by a stroke of luck
to be able to compensate for the pull by fiddling
with the ride height...but it would just be pure
> I initially started off with a half turn tweak on the
Ahhhh...here you are saying that you were
compensating for "sag". Probably what has
happened is that you have changed the
caster/camber enough to cause the truck
to wander to one side.
Yes, frankly it's not a particularly easy measurement
to make...since there is 1/2" allowable variance, I usually
just concentrated on getting the ride height equal from
side to side. You could just measure from the frame
to the ground and make sure that the truck is even
at that point.
After all is said and done....you still need an alignment.
No, it's weird. Parked, it looks pretty good. There's
maybe a SLIGHT difference in ride height from side to
The truck doesn't really pull on me at all. When it sags
to one side, I usually have to crank the wheel slightly
to the other side to compensate. That's it.
Out on the road, it seems to favor leaning to one side
over the other though. I can't tweak either torsion bar
to get the truck to actually ride as level as it should.
One day it likes this side... after tightening that side,
or loosening the other, it flops to the other side. I
can't find an equalibrium.
I followed a 1500 Chevy, and a Tahoe this morning - they
both rode nice and level looking, while mine seemed to
dip excessively, or carry a weird posture for an extended
amount of time.
One more question I suppose - is it necessary to disconnect
the sway bar when trying to level things out when the truck
I'm not certain, but I 'believe' the SS has a larger/tighter
sway bar up front, which I suppose would dampen side to side
torsion bar adjutments slightly.
Thanks for all the help,
Thanks for all the help, Ian, I appreciate it.
One FINAL question - what should I expect to pay for the
Z-height and alignment work?
I just got off the phone with a local dealer, and totally
forgot to ask. I mentioned that I'll probably hang out
at the shop (need a ride), and he said it'll be up on
the rack for about 2 hours. That's a little longer than
I feel like a dumbass calling back and asking. At least
on here, it's rather anonymous. ;)
Well, I have to admit that the local dealers service came
They did the Z-height and an alignment all under waranty.
Last experience I had there was in '99, when they said
it was normal for my S10's pedal to hit the floor when I
braked hard. (DOH...)
The truck rides great.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.