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Time to build a suspension... (looking for input on springs)

Campy, 3 pages no time and you are getting overloaded with info. Keep this in mind, you said you wanted off road comfort, overlanding, forest road capable, not full blown rock crawler. I may be burned at the stake around here as a heritic for saying this, but you don't need to swap to 52's up front or cross over steering to get the goals you want for ride quality.

Get Tuff Country springs or spring for the ORD custom stuff. Do a shackle flip out back with the stock 52's out back. Spring for the bilstiens. Get the raised steering arm for the front 10bolt and get ORD swaybar disconnects. The disconnects pull if you want, but really do a great job in correcting the angle the sway bar sits at with 4" springs. With the angle corrected the sway bar works like it's supposed to.

It's a proven setup for sure, simple and effective. Outside of the front springs it's how I've got my new 91 setup. I do need to upgrade the shocks for sure though. Now if you want more proof to the overlanding ability, look at Larry's K10 and see where he's been across the desert southwest with it. IIRC he's running tuff country's now, but was running skyjacker softrides before. I've ridden shotgun in this truck on and off road and can attest to the almost supple ride quality on the road for a 8,000 pound rig (truck/camper + gear). Off road with the tires aired down it's just stuck to the ground. Since the camper was put in, I don't think I can recall him ever getting stuck. But he's pretty smart behind the wheel too. He needs to upgrade shocks as they begin to fade pretty rapidly after 30-45 minutes off pavement in the desert. Still, for stock length springs up front and push/pull steering he's not had a need or want to go cross over. No bumpsteer, no death wobble. It's a very nice solid truck at 80mph on the highway or creeping along in low range.

The whole goal is to drive out to the fun, spend a week or more off pavement in some awesome country with some techincal trails and then drive back.
You don't have spend more money to start getting into the tradeoffs that each addtional modification brings. Going 52's up front dictates loss of swaybar and you have to run cross over. Well if it's still a 1/2 ton with a 10b you got to find a D44 right side knuckle to get machined or buy one already done. Don't forget probably needing to change the upper shock mounts out for the extended travel the 52's are going to give. The MAW bug will bite you worse when you start moving away from a factory design. Each step adds up to more moolah to spend.

Let's keep it realistic too, as far as the actuall installation of these items. I've read through a few of your threads and if I understand right from your struggles on getting the NV4500 reinstalled in your other truck you are doing this stuff outside on a dirt driveway. Weather is a factor. As a fellow driveway builder (garage is too full to play inside here) I've got to plan my work around the weather and what I can effectively get done in the driveway. Big stuff, I coordinate time in the Bigassgas Garage over at Larry's place. Timed right with help, we've accomplished a full lift with front springs/rear flip in a weekend to swapping my blown 6 banger out of my trailblazer in the same time. What I'm getting to is that going with stock length springs is much easier to accomplish in the driveway. The shackle flip is bear as you'll be cutting rivets out and pulling the rear tank might be required, but it's been done. I'm not saying you can't do 52's up front in a driveway as others have done it, but your time to completion is going to be quicker if you limit the need for major changes.

Keeping in that mind of sticking with what you got, you don't NEED a D60 to do what you want to do. I've wheeled the piss out of my D44 and haven't had a problem when it was left open. Still followed right behind Larry when he was running the tru-trac and Detroit in his. Up until that NOS surplus CUCV D60 fell in his lap a couple of years ago he did multiple desert runs, mountain runs with his D44 equipped with the tru-trac. He just wheels smart, no heavy right foot.

One last thought on the need for cross over steering.. For stock to mild lifts used in mild off road and pavement, it's done just fine. Yes it's limited if you really cross the front axle up since the drag link ends up a big angle effectivly killing steering in one direction. But for what you want to do, forest roads, mild off roading I don't think the expense and modifications required to go to cross over makes sense. Look at it this way did Big Blue do what you wanted on the Yooper trip? By what you said earlier it did. The Suburban is the same, you just want to give it a little clearance for some more agressive/larger tread and take you to the same type of places. Sure if somebody else is paying for the build it's great to say get 52's, go cross over and this, that and anything else that is the thing to have on a top shelf build. Do your cost/benefit review of the suggested modifications that have been listed out and I think you'll see you can get the ride you want without spending a mint on major changes. Spend wisely on the springs and shocks and you'll get what you were looking for.
 
I would like cross over but with a 10 bolt waste of money I think! Correct me if i am wrong.

So then I waisted money. Crossover is a good addition for any axle if the use fits your needs.

As for springs, you will need to come with a happy medium between loaded and unloaded weight. With smooth riding, it makes a big difference. You can always build for unloaded and add air shocks for when loaded.
 
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Do you need a 60?

It's a lot of weight and little ground clearance for a lot of money. If you were going to strain the axles more I would see.

Yes shocks. Bilsteins are barely more than ranchos, but shocks are possibly the best investment for your truck. Other good brands as well. Ask questions. I would even call the vendors and manufacturers with your questions

I don't need a D60, @brans87 said I should send a D60 his way. I've offered such services in the past, and nearly did so with Zim last year, but he decided he didn't need it after all. I occasionally entertain thoughts of trucking $500 D60s out to where folks pay >$1000 for them, but the supply and demand are both bursty enough that I can't see it working out too well. :dunno:

I am compiling a list of questions to ask vendors, based on my own musings and the results of this thread. And lots of other threads. ;)
 
Campy, 3 pages no time and you are getting overloaded with info. Keep this in mind, you said you wanted off road comfort, overlanding, forest road capable, not full blown rock crawler. I may be burned at the stake around here as a heritic for saying this, but you don't need to swap to 52's up front or cross over steering to get the goals you want for ride quality.

Get Tuff Country springs or spring for the ORD custom stuff. Do a shackle flip out back with the stock 52's out back. Spring for the bilstiens. Get the raised steering arm for the front 10bolt and get ORD swaybar disconnects. The disconnects pull if you want, but really do a great job in correcting the angle the sway bar sits at with 4" springs. With the angle corrected the sway bar works like it's supposed to.

It's a proven setup for sure, simple and effective. Outside of the front springs it's how I've got my new 91 setup. I do need to upgrade the shocks for sure though. Now if you want more proof to the overlanding ability, look at Larry's K10 and see where he's been across the desert southwest with it. IIRC he's running tuff country's now, but was running skyjacker softrides before. I've ridden shotgun in this truck on and off road and can attest to the almost supple ride quality on the road for a 8,000 pound rig (truck/camper + gear). Off road with the tires aired down it's just stuck to the ground. Since the camper was put in, I don't think I can recall him ever getting stuck. But he's pretty smart behind the wheel too. He needs to upgrade shocks as they begin to fade pretty rapidly after 30-45 minutes off pavement in the desert. Still, for stock length springs up front and push/pull steering he's not had a need or want to go cross over. No bumpsteer, no death wobble. It's a very nice solid truck at 80mph on the highway or creeping along in low range.

The whole goal is to drive out to the fun, spend a week or more off pavement in some awesome country with some techincal trails and then drive back.
You don't have spend more money to start getting into the tradeoffs that each addtional modification brings. Going 52's up front dictates loss of swaybar and you have to run cross over. Well if it's still a 1/2 ton with a 10b you got to find a D44 right side knuckle to get machined or buy one already done. Don't forget probably needing to change the upper shock mounts out for the extended travel the 52's are going to give. The MAW bug will bite you worse when you start moving away from a factory design. Each step adds up to more moolah to spend.

Let's keep it realistic too, as far as the actuall installation of these items. I've read through a few of your threads and if I understand right from your struggles on getting the NV4500 reinstalled in your other truck you are doing this stuff outside on a dirt driveway. Weather is a factor. As a fellow driveway builder (garage is too full to play inside here) I've got to plan my work around the weather and what I can effectively get done in the driveway. Big stuff, I coordinate time in the Bigassgas Garage over at Larry's place. Timed right with help, we've accomplished a full lift with front springs/rear flip in a weekend to swapping my blown 6 banger out of my trailblazer in the same time. What I'm getting to is that going with stock length springs is much easier to accomplish in the driveway. The shackle flip is bear as you'll be cutting rivets out and pulling the rear tank might be required, but it's been done. I'm not saying you can't do 52's up front in a driveway as others have done it, but your time to completion is going to be quicker if you limit the need for major changes.

Keeping in that mind of sticking with what you got, you don't NEED a D60 to do what you want to do. I've wheeled the piss out of my D44 and haven't had a problem when it was left open. Still followed right behind Larry when he was running the tru-trac and Detroit in his. Up until that NOS surplus CUCV D60 fell in his lap a couple of years ago he did multiple desert runs, mountain runs with his D44 equipped with the tru-trac. He just wheels smart, no heavy right foot.

One last thought on the need for cross over steering.. For stock to mild lifts used in mild off road and pavement, it's done just fine. Yes it's limited if you really cross the front axle up since the drag link ends up a big angle effectivly killing steering in one direction. But for what you want to do, forest roads, mild off roading I don't think the expense and modifications required to go to cross over makes sense. Look at it this way did Big Blue do what you wanted on the Yooper trip? By what you said earlier it did. The Suburban is the same, you just want to give it a little clearance for some more agressive/larger tread and take you to the same type of places. Sure if somebody else is paying for the build it's great to say get 52's, go cross over and this, that and anything else that is the thing to have on a top shelf build. Do your cost/benefit review of the suggested modifications that have been listed out and I think you'll see you can get the ride you want without spending a mint on major changes. Spend wisely on the springs and shocks and you'll get what you were looking for.



YES! Thank you, Rob, for recognizing my goals and helping me fight the CK5 bug. I don't want to build the standard CK5 truck, I want to build exactly a 1/2-ton that is slightly taller and much cushier offroad. Larry's rig and Mosesburb's suburban are exactly what I want to copy. And I am looking at your build, too. This won't be heavy, it won't run 37" tires, it won't see hard boulders. I'm not running fordyce in this thing. Ever. This is for forest road backcountry camping. It's for driving out to Colorado so we don't hafta bring a tent next time. It's for road trips and expeditions. I'd like a simple suspension upgrade, but I'm going to spend more time doing camping mods than suspension mods.

As for shop, I have a leaky horse barn with a sandbox floor. It is kindof out of the weather, and it does keep most of the snow away from the Blazer, but it's not a shop, and I don't have any fancy tools aside from a MIG welder (which doesn't even have a power source yet). I can add more tools as I go, but I'm not doing any crazy builds in the foreseeable future. I also have no local buddies to call to help me bench press said NV4500 when I'm in over my head. Projects need to be manageable.


Look at it this way did Big Blue do what you wanted on the Yooper trip? By what you said earlier it did. The Suburban is the same, you just want to give it a little clearance for some more agressive/larger tread and take you to the same type of places. Sure if somebody else is paying for the build it's great to say get 52's, go cross over and this, that and anything else that is the thing to have on a top shelf build. Do your cost/benefit review of the suggested modifications that have been listed out and I think you'll see you can get the ride you want without spending a mint on major changes. Spend wisely on the springs and shocks and you'll get what you were looking for.

Good points, all of which have been noted. Springs and shocks are what I was hoping to upgrade, I'd be quite happy if I didn't hafta touch anything else. I'm also adamant that I don't want the mods to snowball. More tires = more axle = more lift = crossover = new driveshafts = weird vibrations & rattles = redoing things to fix the new problems = upgrading to full hydro = now I've spent thousands of dollars building a rig I can't even drive down the road without zig-zagging. Standard CK5 recipe, but it's not what I'm looking for. :doah:


Maybe I'll go read through Larry's thread again. Those desert overlanders have always been my inspiration for this truck (even if I do prefer the woods :wink1:).
 
As for springs, you will need to come with a happy medium between loaded and unloaded weight. With smooth riding, it makes a big difference. You can always build for unloaded and add air shocks for when loaded.

This is an idea that I used to have in the back of my head, but the deluge that I got tonight washed it right out. :doah:

Thanks for bringing it back to the forefront.
 
Let's go back to my original questions.

#1) How far can I take push-pull steering before it becomes unpleasant and/or unworkable? I'll repeat that I'm happy with the way my stock steering currently behaves. Sounds like a great philosophical divide, but I'm firmly on the side of "leave it alone unless it's going to be a problem." Sacrificing sway bar is not an option, Wifey says so. :deal:

#2) Looks like this has been answered. Folks run cheap springs in the back because they're fine, they run expensive springs in the front because 48" negative-arch springs can't simply be flipped like the rear can. Good shocks and having more travel (staying away from the bump stop) should solve my cranky family problem (baby does not like hard bouncing very much).

#3) Driveshafts. Still haven't gotten any input on this. On the back end, my pinion moved forward an inch or so when I axle swapped, so I have enough slip yoke to add some lift. But I'm not sure how much. On the front end...hmm...not sure how much slip I have. I have an extra stock-length front driveshaft, but I can't really make it longer if the slip is too short for a lift. I think I'm gonna hafta stick with a lift short enough to retain the stock driveshafts. Not sure exactly what to ask here, but I'm looking for input as to when this point might be. Yes, I know it depends on a dozen different things that all hafta line up perfectly in order to avoid vibrations. I'm gonna hafta do some more reading, but general ideas would be welcome.
 
You can do the springs and leave push/pull as long as the angle of the shaft is level at ride height. If that does not work like you want, then add the cross over. I see factory geometry working on 35" tires all the time. It is when articulation is needed is when it is less than optimum.

Run 33s and a short lift and call it done. Then add niceties as money and time allow.
 
Campy, read up on what Larry did building his burb. It went on the desert trip this year with a co-worker buddy and his wife running it. It's running pretty much all hand-me-down hardware from the K10. It did pretty well on the trip. That's running the old shocks and skyjacker springs from the K10. He did spring for ORD shackle flip brackets new, but the rest was lifted out of the used parts pile.

If you really don't want to mess with driveline modifications, you might scale back to 2" lift springs and the shorter 2" flip kit from ORD. The shackle flip might require some shimming to get the driveline angle right out back, but only going 2" should keep the drivelines in check. The wheelbase on the burb is more forgiving than a shorter wheelbase K5 or short box truck, where I needed a full blown CV rear shaft, Larry got away with stock length but making a pinion angle adjustment. That was with us using the same stuff out back with ORD flip kit. I didn't have to add length to my front shaft, but did modify the cv so it didn't bind when flexed.

Given the negative arch the stock front springs have and your worn out springs out back, the 2" setup might net an extra inch because you are correcting for worn out stuff.

Keeping at 4" of lift or under the stock steering is just fine. GM did build it this way for 18 years for some reason in the squares, 5 years in the 67-72's and every solid axle truck before it (even 2wd). It's not perfect, but for the mild build it's more than acceptible.
 
You can do the springs and leave push/pull as long as the angle of the shaft is level at ride height.

I assume you are talking about the drag link? :dunno:


Run 33s and a short lift and call it done. Then add niceties as money and time allow.

Seems like a "short lift" around here means 4 inches. :dunno:
 
Campy, read up on what Larry did building his burb. It went on the desert trip this year with a co-worker buddy and his wife running it. It's running pretty much all hand-me-down hardware from the K10. It did pretty well on the trip. That's running the old shocks and skyjacker springs from the K10. He did spring for ORD shackle flip brackets new, but the rest was lifted out of the used parts pile.

If you really don't want to mess with driveline modifications, you might scale back to 2" lift springs and the shorter 2" flip kit from ORD. The shackle flip might require some shimming to get the driveline angle right out back, but only going 2" should keep the drivelines in check. The wheelbase on the burb is more forgiving than a shorter wheelbase K5 or short box truck, where I needed a full blown CV rear shaft, Larry got away with stock length but making a pinion angle adjustment. That was with us using the same stuff out back with ORD flip kit. I didn't have to add length to my front shaft, but did modify the cv so it didn't bind when flexed.

Given the negative arch the stock front springs have and your worn out springs out back, the 2" setup might net an extra inch because you are correcting for worn out stuff.

Keeping at 4" of lift or under the stock steering is just fine. GM did build it this way for 18 years for some reason in the squares, 5 years in the 67-72's and every solid axle truck before it (even 2wd). It's not perfect, but for the mild build it's more than acceptible.

I will go back and read through that again. ORD says "We typically don't use any steering correction on a '67-'87('91) Chevy truck until the truck has 3" of lift or more." I've long had a thought that 2" is a sweet spot where stock stuff still works and things aren't too crazy. And, yes, on the Suburban, 2" would probably lift it 3" above where it is now. I added zero-rates to the back to level it out a couple of years ago, it looks much more even with the extra inch back there. This picture is when the truck was loaded up. But it's still saggy even when unloaded.


IMGP4318.JPG
 
Seems like a "short lift" around here means 4 inches. :dunno:

There are 2" lifts. ORD sells a shorter shackle flip. Account for your gear too. You might need a zero rate out back to keep it level when loaded. even with the 2" flip.
 
I'm gonna get reamed for this, and it's not because we sell them, coilovers.. And links, for your purpose it has the least amount of compromise with the most amount of value. Keep the driveshaft. Crossover in our experience reduces steering effort and adds precision. It also allows more steering angle in both directions because we all now the stock stuff does not allow that to happen when articulated.

You get a few more benefits moving away from leafs too. That wandering feeling will be gone, the mush front end feeling will be gone, it'll perform better in every measurable way. It'll be a safer truck. It'll rattle less, it'll last longer because the chassis isn't taking the abuse it normally would.

Cons, price, assembly, cost of maintenance. Heims wear out, that's the deal they make noise when worn, tie rods hide that better, leafs hide that better.. Links do not..
That's my two cents.. Once you ride in a coiled truck it's hard to even compare..
 
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Just for info, SDtrucksprings sells brand new stock rears for pretty cheap if you wanted to go with a shackle flip but don't like your springs.... may be in the area of lift springs for the cost of both though......? And if you draw a straight line down the top of your tires and check it against the chrome molding you'll see that it really isn't sagging much, if at all. The taller wheel opening in the front causes an optical illusion. Park on a level spot and measure to the door bottom once....


And for the record.... I have a 3" lift :) so I guess I'm one of the odd balls lol
 
I'm gonna get reamed for this, and it's not because we sell them, coilovers.. And links, for your purpose it has the least amount of compromise with the most amount of value. Keep the driveshaft. Crossover in our experience reduces steering effort and adds precision. It also allows more steering angle in both directions because we all now the stock stuff does not allow that to happen when articulated.

You get a few more benefits moving away from leafs too. That wandering feeling will be gone, the mush front end feeling will be gone, it'll perform better in every measurable way. It'll be a safer truck. It'll rattle less, it'll last longer because the chassis isn't taking the abuse it normally would.

Cons, price, assembly, cost of maintenance. Heims wear out, that's the deal they make noise when worn, tie rods hide that better, leafs hide that better.. Links do not..
That's my two cents.. Once you ride in a coiled truck it's hard to even compare..

I'm not going to ream you, but I think coilovers are a bad idea for a few reasons. First is cost. I'm not putting thousands of dollars into this suspension at this time. If I could link my front axle for $700 (approximate cost of custom leaves) I would probably do it. But as it is links are a whole lot more expensive than custom leaf springs. Second is time. I'm impressed with your kit, but it's not something that I can install in 3 or 4 hours like I can redo the front leafs. Even the shackle flip is a fairly minor mod comparatively. I love links in theory, but this is neither the time nor the right truck for that conversion. Maybe when I have an actual shop with a FLOOR and crawling under the truck to weld brackets is funner. Right now this truck already needs a bunch of underbody work, I don't have much motivation to add a bunch more.

It comes down to driving style. This truck sees road miles, articulation is something that it has never had, and also something that it has never needed. Links are serious overkill for a roadtrip/expedition rig. IMO, at least. Thanks for the input, though. You made a good pitch, and I'll add it to the list of considered ideas. :thinking:
 
Just for info, SDtrucksprings sells brand new stock rears for pretty cheap if you wanted to go with a shackle flip but don't like your springs.... may be in the area of lift springs for the cost of both though......? And if you draw a straight line down the top of your tires and check it against the chrome molding you'll see that it really isn't sagging much, if at all. The taller wheel opening in the front causes an optical illusion. Park on a level spot and measure to the door bottom once....


And for the record.... I have a 3" lift :) so I guess I'm one of the odd balls lol

Thanks for the tip. It looks like SDtrucksprings is a little pricier than thesuspensionking.com. In the picture, the rear is sitting on a zero rate to bring it back up to somewhat equal height with the front (plus the 14BFF axle tube is a little taller than the 10-bolt tube was). Before the swap it was a noticeable sag (don't think I have a good picture).
 
There are 2" lifts. ORD sells a shorter shackle flip. Account for your gear too. You might need a zero rate out back to keep it level when loaded. even with the 2" flip.

I had some interest in a 4" lift for 2 reasons. #1, there's a set of ORD 4" springs in the classifieds section right now (though I haven't contacted ORD to see what vehicle weight they recommend with those springs). The other had to do with Luke's recycled stock shackle mounts. As weird as it looked, I actually like what he did. Attached the stock shackle to the stock bracket upside down (by cutting a slot in the bracket). It may have been intended for "temporary" use, but it has held up and makes good use of the hardware that came with the truck (though I sure wouldn't do that with a Ford shackle!). No, I don't have a picture, and it looks as tacky as it sounds. But unless it's going to tear in half I don't see the downside. Aside from looking tacky, of course. ;)

If it costs me driveline/steering issues, I'm more than happy to stay shorter, though. :thinking:
 

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