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I posted in the main super duty area but not really any traffic there, hoping I can get some answers here. I’m wanting to replace my rear springs with some that sit a little taller and have less payload, current running 4400lb springs. I was thinking a set of 08 length deavers but can’t seem to get an answer for the lift height I need to sit where I’m wanting. The front has a 2.5” level kit and rear before flatbed sat roughly 1” higher, still is close to that but rear fender is a lot closer. I have a 1” block I’d like to ditch and in the process get another 1” lift above where I am now. Unless I’m looking at it wrong I think a 4.5” lift spring would set me where I’m wanting to be but without measurements from someone with that height or close or a knowledgeable persons input I’m shooting in the dark. And definitely don’t want to do that with the cost the deavers. So does anyone have a measurement from the axle tube to the bump stop base or could measure if they’ve got a 3.5-4.5” lift in the rear?
Another option might be to contact @ATS Junior and work out set they build for you based on your specifications. I am fairly certain ATS has done this in the past for other FTE'rs.
I have the ATS 2800 lb'ers. They work very well, the ride height was good with my 2.5 leveling kit. They had 4400 lbs springs, but they said those were good if you were a landscaper and rode around with a pallet of sod or 2 in the bed every day.
Hadn’t thought of ATS for some reason, I’ll get ahold of junior. Yeah I’ve got the ATS 4400 springs and they did amazing when hooked to a 12k bumper pull, driving empty with just under 4K on the rear axle though I might as well not have any suspension back there. Wanting more lift since the flatbed fender is a lot closer to the tire compared to the front, obviously won’t get it as far as the front but some more gap would be nice.
Got ahold of ATS, they said they don’t have anything that would work without the use of a lift block which I’d rather avoid if possible. Heard back from Carli suspension and they have no clue, deaver doesn’t know and Trevor at PMF seems to only be able to tell me that they sell the springs. So pretty disappointed that of those 3 none of them are able to tell me anything except I don’t know and yes we sell springs. Hoping someone chimes in with measurements or experience, if anyone here has done pretty similar, so I could get some softer riding springs ordered to be able to install once the weather turns warmer again.
I don't have the 08 rear leaves, but I do have front leveling springs and deleted the rear blocks on my e99. They are procomp and when new it took 4” lift springs plus 2” blocks to get a slight forward rake and look right w/ my flatbed. After a broken leaf I replaced the single leaf in each side w/ comparable length replacement from a used set, added overloads and removed the blocks. This had me squatting fairly bad and driveline angles were not happy. The only option I could come up with that didn't involve blocks was a shackle flip. Everything I read prior said compression shackles are less stable and could cause the rear to be a little squirrely, but I couldn't be happier with the ride and stance it has and no more axle wrap causing blocks to worry about. Don't know if this helps with what you're wanting to do but it's what I got.
Do you have a pic of your truck, to see how you sit with the flatbed and front level. The rear sits maybe an inch higher than the front. I took pics with my bigger tires and lifted the rear to simulate the lift but took them from different angles so I need to do it over.
Got new pics with my bigger tires, first pic is with 1” more rear lift, second is just sitting as is. Supposed to talk with Jeff at deaver tomorrow to see what he can do.
Other than to the rear the space for the back tire has a fair amount of space, all it would take to move the room is to cut off a mount for the close mud flaps. The 37s look good but I’m torn between them and a set of true 35” tires when I’m due for new tires. Even my 34s look crowded when hooked to my 5th wheel, but nothing a set of air bags wouldn’t stop which will be added when I change the springs anyways. I tried getting pirate to take a look and give his input but no dice yet.
Didn't remember until after dark but I get those pics for ya. Here she sits on level ground w/ 235/85r16, leveling springs up front, 4” lift springs no blocks w/ shackle flip rear. Her average day running around wt is right at 10k.
Cool, thank ya. Did it sit pretty much the same before the shackle work? Mines sitting about 9k, the bed is empty most of my driving. I’m definitely looking forward to some softer riding springs after today. I purposely chose to drive down one road faster than normal and it was miserable, another one on the way to a friends house was terrible even at 20mph. Illinois roads are terrible.
No it had a noticeable rake to the rear. I gained around 2.5-3” flipping the shackles. The math works out to about 1/2. So if you change the shackle 4” you'll see 2” of lift.
Good to know. I’m hoping to talk to deaver before I have to head to work today to see what we might be able to figure out. I did find out the other day 1” more lift would be ok looking, 2” is too much though. Didn’t even bother to take a pic it looked so weird.
