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H3 Torsion Bar Crank

Hunner

Well-Known Member
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2,334
Location
Arkansas
You can get fancy by using a square and a level placed at the center of the axle to align with the tape measure placed under the inside of the fender.
That way you don't bend it in to the axle.....

If removing the hub cap is an issue you might not want to be the one cranking up your torsions!

PS I keep "spare" nuts in my tool drawers!@!
 
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Hunner

Well-Known Member
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2,334
Location
Arkansas
24.5 from center of hub to bottom lip of fender is BAD. You will see severe angles for the tie rods and CVs. Just because you can, and just because Truxx says it's okay, it isn't okay. I'm glad you took the time to ask.

Like Roller said, you don't need the keys. Turn your torsion bars up to about 23.5" max, drive around, remeasure.

In addition to that the shocks will be jerking and topping out and you will have bump steer under acceleration and when hitting dips in the road, watch out for dips they have to live too.
 
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IISPEEDYII

Well-Known Member
Messages
478
Location
Pennsylvania
So I did the T-bar crank, and im sitting at 23.5 on the passenger side, and I'll get the driver side to 23.5 but every time it sags down again, first to 23, now to 23.25. Do I keep cranking it to even it out or do I leave it? or do I drop the passenger side down so they're even?
 

SuperBuickGuy

Well-Known Member
Messages
3,403
Location
Woodinville, WA
crank... but be sure you put a floor jack under the rear differential so that you're getting even weights on the corners... also, if you want to be really good, disconnect the sway bars.
 

IISPEEDYII

Well-Known Member
Messages
478
Location
Pennsylvania
crank... but be sure you put a floor jack under the rear differential so that you're getting even weights on the corners... also, if you want to be really good, disconnect the sway bars.

Alright, I did that, I am sitting at just above 23.5, maybe 23.6 or 23.7 I can't really tell but its all level now and I assume thats okay to leave it there just above 23.5?
 

Chocflip201

In the Rocky Mountains
Messages
585
Location
Utah
If you put a level on the core support you also need to check the ground and either make sure you are on dead level ground, or you need to subtract the difference of the ground slope from the radiator slope...

To to me it's easier to get better results just to make sure both distances from center of hub to fender lip are equal on both sides of your truck. Doing that will eliminate any variables of unequal tire pressure, or uneven ground.
 

IISPEEDYII

Well-Known Member
Messages
478
Location
Pennsylvania
Its 23.7 to the fender, and they're even, I got a better tape measure so I can see the lines. Is that safe to leave it at that height?
 

amrg

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Its 23.7 to the fender, and they're even, I got a better tape measure so I can see the lines. Is that safe to leave it at that height?

Drive it around for a day and re-measure. If it stays there drop it abit (personally I believe 23.25 is good, leaves some room for your tires to drop when you hit a pot hole). General consensus is anything up to 23.5" is good. Its up to you where you want it to be. But if your running an I5, its better to be at least 1/2" less in the front than rear because under full throttle the suspension is so soft the nose lifts up alot, enough for you to see the stars at night :p
You will also feel like your driving into a wall once you go 80 mph, the nose stays up the whole time it makes it painstaking to just reach 85!
 

IISPEEDYII

Well-Known Member
Messages
478
Location
Pennsylvania
Not really worried about speed, I could barely keep 80 with the roof rack on before the lift. And thanks for that info. Exactly what I was looking for. I hope it drops haha, I can't tell you how many time it fluctuated yesterday between tests.


Sent from my iPhone using Tapatalk
 

SuperBuickGuy

Well-Known Member
Messages
3,403
Location
Woodinville, WA
If you put a level on the core support you also need to check the ground and either make sure you are on dead level ground, or you need to subtract the difference of the ground slope from the radiator slope...

To to me it's easier to get better results just to make sure both distances from center of hub to fender lip are equal on both sides of your truck. Doing that will eliminate any variables of unequal tire pressure, or uneven ground.

really? look at your avatar - if you measured either side and set from there; there could be a problem

One presumes, as he's a Hummer owner (and obviously quite smart and discerning) that he realizes without need for typing that the ground must be level too.

I totally get why you said it, though, Jeep and Land Rover owners also sometimes mistakenly come into this site - so you want to make sure they don't leave with the wrong impression - but I just don't have time to pander to the lowest common denominator.
 
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IISPEEDYII

Well-Known Member
Messages
478
Location
Pennsylvania
really? look at your avatar - if you measured either side and set from there; there could be a problem

One presumes, as he's a Hummer owner (and obviously quite smart and discerning) that he realizes without need for typing that the ground must be level too.

I totally get why you said it, though, Jeep and Land Rover owners also sometimes mistakenly come into this site - so you want to make sure they don't leave with the wrong impression - but I just don't have time to pander to the lowest common denominator.

Haha that last part made me laugh so hard. But yeah I did it on on a rock path while I was wheeling, I enjoy doing my work out on the trail ya know? Makes sure everything is just right when I need it. But really, I did it in my drive way.
 

Chocflip201

In the Rocky Mountains
Messages
585
Location
Utah
really? look at your avatar - if you measured either side and set from there; there could be a problem

One presumes, as he's a Hummer owner (and obviously quite smart and discerning) that he realizes without need for typing that the ground must be level too.

I totally get why you said it, though, Jeep and Land Rover owners also sometimes mistakenly come into this site - so you want to make sure they don't leave with the wrong impression - but I just don't have time to pander to the lowest common denominator.

actually the only reason why I said it is because the OP was asking some very basic questions, (or lowest common denominator questions I guess) like "how my tire size will affect my center-of- hub to fender lip measurement" when most all of us know that tire size doesn't effect that measurement.

So based on that alone I felt I needed to cover the basics of: if you check your radiator core support while parked in a driveway with say 1% of slope to the side, not everyone will see that 1% of slope, thinking their driveway is level, and therefore if they make their torsion bar adjustments to get the radiator core support level, and not check both sides with a tape measure they effectively just put over ½" difference in height between sides.

Or even say ½% slope, (almost invisible to an untrained eye, and only 1/16th of a bubble past the line on a level) you still get over ¼" difference between sides.

Same goes with tire pressure. If you are on dead level ground, and don't notice your left side has 25 psi, and your right side has 35 psi, depending on how much the tire sags lower (who knows how much, different for each tire model) and you check with a level on your core support, you just put however much your tire sag height difference into your suspension. I'll state more than likely though that this much difference between sides is likely just fine and close enough.

Of course most of us know these things, and will counterbalance for these variables. But for the people asking the basic questions, maybe those variables just got put into the suspension.

I apologize before hand if I sound like I'm trying to argue, I'm not. I'm not one to argue much over the internet. Just stating my 2¢ and it can be taken or left to rot. I hope I didn't come off ornery or defensive. I love the H40, and am here for the same reasons as everyone else.
 
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IISPEEDYII

Well-Known Member
Messages
478
Location
Pennsylvania
I lowered it down to 23.25 and I can feel a SIGNIFICANT difference from 23.5-23.7 where I was fluctuating from. I feel much safer at this height, and a lot better ride quality than before.
 

amrg

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I lowered it down to 23.25 and I can feel a SIGNIFICANT difference from 23.5-23.7 where I was fluctuating from. I feel much safer at this height, and a lot better ride quality than before.

Before gettin an alignment try to give the suspension a workout. You dont want to go through one only to find your truck changed height a day later!
 
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