Rear Squat on Air Suspension

[kacyk]

Anthony,

I sold the Pewter H2 so I don't have any pics of it after the fix. Unfortunately they wouldn'y fix the new H2. I'm planning on taking it back to the original service advisor that fixed our fist H2 under warranty.

[TXSUT]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by kacyk:
Never mind, I bought a 18 MM socket and adjusted the torsion bars myself. It's level now. </div></BLOCKQUOTE>

It is my firm belief that when an H2 is sitting perfectly level, the fender gap in the front is taller than the fender gap in the rear. It's made that way, whether the looks are appealiing or not.

I just wanted to throw that out there to avoid confusion about someone saying the truck is level, when in fact they mean the fender gaps are the same. IMO, they are mutually exclusive measurements.

-Pete

[kacyk]

I know this is a an old and tired thread but Bellevue Hummer flat out refused to address the front clearance issue on my wife's yellow H2, stating that it complied with factory specs. Ironically the bastards made torsion adjustments to my pewter H2 but I guess this is a different day.

Anyway, I did come across McGaughy's spindles that would safely drop the front about 2 inches. The question is, will my 35/12.50-18 wheels rub? Any thoughts?

BTW - I only want to drop the front and the fender to tire "gap" is about 1.75 inches greater in the front of the truck so a 2" drop would just level it out. Not sure why but the gap does not look as bad in this pic.

[Anthony]

At this point I'm thinking of lowering the front to make it look better, but that just seems counter productive. First time the skid plate hits something I'm going to think twice about lowering a hummer.

Is there any way to adjust the air susp to stay up an inch higher? could there be a computer adjustment or program to do this?

[Anthony]

Here is a pic of the day after we picked it up last year. One of the only ones I have on this computer. Sorry it's so large.

[dochummer]

Here's an idea, how about if I just throw 37's on the rear and leave the front with 35's? I'm guessing it'll probably really mess up the drivetrain or something...

[dochummer]

Thanks paragon. I know it's been listed before...but what is the correct D height measurement as well as Z height measurement?

Anthony, do you have another pic? Can't quite see your vehicle completely

[dochummer]

Here's a semi-side shot of mine. Front Left is 9 1/4" and Rear Left is 7 7/8" - from top of tire to fender trim. To me, it looks off....

[dochummer]

Is 42" the proper measurement all around for the vehicle? I just spoke with the service department at a Hummer dealership and told them about my rear squat problem. He mentioned that there's a TSB that has measurements from the chassis to the ground that tells them if the truck is sitting correctly. He didn't recall them off the top of his head. Just want to check and see if my truck falls within the TSB guidelines before I bring it in to the local GM dealership to look at. I've mentioned the rear squat issue before, and they said it was normal. While I was at bellevue hummer, I noticed that all the vehicles on the lot definately rested differently... He did mention that the front wheel well is supposed to sit slightly higher than the rear... I'm also due for an oil change, so I'm thinking if it's something that can be fixed, I'll do it at the same time.... Hate not having my H2 to drive

[dochummer]

While i'm at it, anybody have suggestions for cleaning the wheel well? Armor-all?

[Anthony]

here is mine

[Anthony]

Measured mine yesterday. 9.5 front and 8.25 in rear. Does that mean mine needs replaced? or just adjusted?

[kacyk]

I found this pic and it was after the fix...but it's not really a good angle. Actually, it still looks like it's squatting! The side steps will angle down in the front after the ride height is adjusted down in the front.

[PARAGON]

Oops, sorry. Info doesn't do much good without that. Let me look it up.

[dochummer]

Not yet... I haven't decided what I want to do about it yet.... Sometimes, when it's parked on the street it looks fine...other times, it doesn't. Once I find a perfectly level area, then I'll re-measure everything....

The squat is the only thing I have left to figure out...just got the steering wheel half-shaft? replaced last week...

Is leavenworth where they are having the next HH for the seattle area? I can't remember off the top of my head...I know it's in Oct.

[PARAGON]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by dochummer:
While i'm at it, anybody have suggestions for cleaning the wheel well? Armor-all? </div></BLOCKQUOTE>When the dealer washes my truck, my wheel wells come back clean and black. I know there is some stuff you can spray to "renew" the wheel wells for when you are going to sell, but I am really not sure what process the dealer uses. My wheel wells look like new every time.

[PARAGON]

<H1>Trim Height Inspection Procedure</H1><A name=ss1-796914><A>
<H5>Trim Height Measurements</A></H5>


Trim height is a predetermined measurement relating to vehicle ride height.
Incorrect trim heights can cause bottoming out over bumps, damage to the
suspension components and symptoms similar to wheel alignment problems. Check
the trim heights when diagnosing suspension concerns and before checking the
wheel alignment.</P>


Perform the following before measuring the trim heights:</P>

1. <LI type=1>Set the tire pressures to the pressure shown on the certification
   label. Refer to <A>Label - Vehicle Certification</A> in General Information.
   
   <LI type=1>Check the fuel level. Add additional weight if necessary to
   simulate a full tank.
   <LI type=1>Make sure the rear compartment is empty except for the spare
   tire.
   <LI type=1>Make sure the vehicle is on a level surface, such as an alignment
   rack.

<A>
<H5>Z Height Measurement</A></H5>

1. <LI type=1>Lift the front bumper of the vehicle up about 38mm
   (1.5in).
   <LI type=1>Remove your hands.
   <LI type=1>Allow the vehicle to settle into position.
   <LI type=1>Repeat this jouncing operation 2 more times for a total of 3
   times.
   
   <A></A>
   
   <LI type=1>Measure from the pivot bolt center line (3) down to the lower
   corner (5) of the lower ball joint (1) in order to obtain the Z height
   measurement (4).
   <LI type=1>Push the front bumper of the vehicle down about 38mm
   (1.5in).
   <LI type=1>Remove your hands.
   <LI type=1>Allow the vehicle to rise.
   <LI type=1>Repeat the operation for a total of 3 times.
   <LI type=1>Measure the Z dimension.
   <LI type=1>The true Z height dimension number is the average of the high and
   the low measurements. Refer to <A>Trim Height Specifications</A> .

<A name=ss3-796914><A>
<H5>Z Height Adjustment</A></H5>

1. 
   
   <A></A>
   
   <LI type=1>For vehicles equipped with a torsion bar suspension turn the bolt
   (1) that contacts the torsion arm clockwise to raise the and
   counterclockwise to lower the height adjustment. One revolution of the bolt
   (1) into the nut increases the Z height by approximately 6.0mm
   (0.2in).
   <LI type=1>For vehicles without torsion bars, replace damaged or worn
   components as necessary.

<A name=ss4-796914><A>
<H5>D Height Measurement</A></H5>


The D height dimension measurement determines the proper rear end ride
height. There is no adjustment procedure. Repair may require replacement of
suspension components.</P>

1. <LI type=1>With the vehicle on a flat surface, lift upward on the rear
   bumper 38mm (1.5in).
   <LI type=1>Remove your hands.
   <LI type=1>Allow the vehicle to settle into position.
   <LI type=1>Repeat the jouncing operation 2 more times for a total of 3
   times.
   
   <A></A>
   
   <LI type=1>The D height is obtained by measuring the distance between the
   edge of the jounce cup along the jounce bumper center line and the jounce
   pad on the rear axle.
   <LI type=1>The true D height dimension number is the average of the high and
   the low measurements. Refer to <A>Trim Height Specifications</A> .
   <LI type=1>If these measurements are out of specifications, inspect for the
   following conditions:
   <UL type=BULLET>
2. Sagging front suspension Refer to <A>Torsion Bar Replacement</A> in
   Front Suspension.
3. Sagging rear coil springs Refer to <A>Coil Spring Replacement</A> in
   Rear Suspension.
4. Proper air suspension operation.
5. Worn rear suspension components.
6. Improper tire inflation Refer to <A>Tire Inflation Pressure
   Specifications</A> in Maintenance and Lubrication.
7. Improper weight distribution
8. Collision damage

[/list]

[PARAGON]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">Originally posted by Anthony:
At this point I'm thinking of lowering the front to make it look better, but that just seems counter productive. First time the skid plate hits something I'm going to think twice about lowering a hummer.

Is there any way to adjust the air susp to stay up an inch higher? could there be a computer adjustment or program to do this? </div></BLOCKQUOTE>Well, I guess you could make some adjustment to the little arms for the sensors in each rear wheel well. Not sure if anyone tried this.

[dochummer]

How about some "after" pics

[kacyk]

Everything measures out at 8 inches now. I may go a tad lower in the front but I haven't decided. I'll send you a pic once I get back from Leavenworth. Did you make the torsion adjustment as well?