99 Suburban LT K1500 - Slow build

[99'Subourbon]

So here's an idea of what my suspension looks like.

CV Angles, no ribs touching, damn near flat and the adjuster bolt on they torsion key is all the ways in.

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It does appear the bump stops are making contact (don't know how frequently this is happening, but I'd assume a lot).

Here is my rear springs, they are 4/1 which I think is a 2025 or 2200 load rating. Everywhere I check says the suburban should have a 5/1 2900 load rating spring. It looks like these are way to flat, and should be more curved? If someone else with a burb could chime in with a pic that would be helpful.

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[Cokeman95]

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Here's what's on my 99 suburban

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[99'Subourbon]

Here's what's on my 99 suburban

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From the side, do they look as flat as mine? That does appear to be a 4/1 like mine, Eaton Springs and SD Truck Springs both told me I needed 5/1.

 

[Cokeman95]

Mine are worn and could use replaced so this may not be much help but at least you have something to compare to.

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I think mine look flatish.

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[slowburb]

And mine. They're not flat.

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You just need some new spring packs.

 

[99'Subourbon]

And mine. They're not flat.

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You just need some new spring packs.

Yeah yours have a ton of curve. Looks like a 4/1 pack too. Any ideas where to order them?

Also, any insight on the torsion bars/angles?

 

[slowburb]

I just saw them on rockauto for like 263 apiece. I'm sure you can find them for less than that. It showed a Dayton part number 22905. I think replacing the leaf packs will improve the feel in the front. My angles are about like yours, maybe a little steeper.

 

[99'Subourbon]

I just saw them on rockauto for like 263 apiece. I'm sure you can find them for less than that. It showed a Dayton part number 22905. I think replacing the leaf packs will improve the feel in the front.

SD truck springs has k1500 4/1 pack springs for 98$ a piece. But suburbans show 5/1. Any reason why they wouldn't fit?

 

[99'Subourbon]

Looks like suburban springs are shorter then pick-up springs. But I did find some 4/1 springs. I'll be ordering them.

 

[slowburb]

I speculate that the 4/1 and 5/1 choices are for different factory towing capacity options. The 4/1 shows 2200# and the 5/1 shows 2700#. This has to be for more tongue weight or overall towing capacity. Both the 1500 and 2500 Suburban show 4/1 and 5/1 packs available as OEM parts options, which suggests what I speculate, that it's based on payload or towing capacity, and that a 5/1 pack could be on a "heavy half" while a 4/1 could be on a light duty 2500.