Lift springs

[Budneeds2beers]

Hey guys, well it’s becoming time to order the rear deavers for the truck. I went with a cognito 7-9” lift (thanks radrichie). I plan on running it as low as possible (flattest angle i can get) on 35’s. Well here is my dilemma, do i go with 6” springs or 4”? I am planning on a sulastic shackle so would it be better to go four and account for the shackle and its lift? Or do i go six with the shackle and anticipate spring sag? Not sure. Any insight in the shackle? Is it needed? Or are the spring good enough? Thanks for any insight.

 

[Chevy1925]

well the 7-9" lift is going to go as low as about 6-7". if it were me, i would buy the 4" lift springs, put the shackles on and adjust ride height with a small 1" or 1/2" block if needed. leaf springs will sag over time, even stock ones so when they start to do so, send them back to deaver and they will re-arch them or replace bad leafs. thats very common for those that desert race on leaf springs still. once or twice a season they need a refreshing but they last a little longer on a truck that wont be using 16-20" of rear suspension travel all the time

 

[Ridin'GMC]

I have 6" deavers on my 6" RCD lift and used 3" lowering shackles in the rear. So far it's sitting perfectly level. I went that route in case if I upgraded my front suspension to the Cognito 7-9" which I will be doing in the future.

 

[Budneeds2beers]

Ridingmc:
For your lift how high are you running it in the front?

James:
I see what your saying but my only thing is the sag over time. I would be afraid that even with a one inch block the sag will sit to low eventually only being 4-1/2 to 5” at best. I know i can rearch them (aint no one got time foe dat shit (j/k)) when they start to squat. I hated having to do it every season for my yota. Also i do tow a 28’ toyhauler once in a while. So i know the sag should happen a little faster for the 6”...

 

[Chevy1925]

Deaver adds height by adding arch. Not the best way to keep height. Their springs with no added arch already lift the ass end 2-3” iirc.

That’s just my suggestion though. This will come down to what you like best. I personally would rather have a custom pack built so the truck rides like a cloud. It’s just tough to figure out how to haul the trailer too in the way I would like

 

[Ridin'GMC]

My front is probably the same as your lift with leveled CV shafts, mine has a little angle to it in the front. However James is right, they added more arch to the spring to gain lift, it does ride stiff but it's a little better than stock with overloads. However, when it comes to towing heavy, it'll sag. You'll have better ride quality by getting a 4" spring with a block and get airbag for the towing part.

 

[Budneeds2beers]

Anyone know the u bolt kit needed for 6” springs?

 

[Budneeds2beers]

What I meant was the ubolts for a deaver 6” lift spring to stock axle. Not for 6” blocks... thanks guys/gals for any insight

 

[Bdsankey]

What I meant was the ubolts for a deaver 6” lift spring to stock axle. Not for 6” blocks... thanks guys/gals for any insight

I don't think the Deaver springs are that much thicker to require a special u-bolt. Worst case, measure the pack height when you get them and call a local spring shop as they usually bend them to suit from threaded rod.

 

[1FastBrick]

Deaver can make you set of U-bolts. I have had them made there before.

 

[Budneeds2beers]

Perfect. I will give them a call and add them to my order.