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I have a 2025 F250 6.7 HO FX4 that has about a 2.5" rake, I'm thinking about leveling it a little to reduce the rake to around 1" - 1.5". I found a local deal on some Tremor springs, they came off a 2022 when new, had less than 1000 miles on them. Spring code is LC3C-5310-ATA LAT, springs on my truck are LC3C-5310-AMB LAM. My research has shown these both have a spring rate of 5,200lbs, so shouldn't affect the ride. I assume springs from the 2022 are interchangeable with my 2025, not sure if the track bar is different or if I even need it, but it was included in the package. I'm also not sure if I'll use the shocks or not, most people here don't seem to be fans of them, but are they better than the stock FX4 shocks? Who here has experience doing this swap, how did it turn out? Do I need to change out the track bar? Any other thoughts or things I should look out for before diving into this?
Can't tell you if the springs from a '22 fit a '25, but yes, a Tremor spring set SHOULD give you a bit of a level. You'll want the shocks (or shocks of the same length) or you'll risk damaging your stock ones.
See if the Tremor track bar is the same length or longer than regular track bars. A one inch front lift will likely shift the axle a half inch, so you would be better with the longer track bar.
The Roush kit doesn't come with a new trackbar, trackbar bracket, or caster alignment cams. Is that weird? It claims 1.5" of lift in the front but nothing to correct the center of the axel or the floaty feeling in the steering (because of the slight rotation of the front axel). I bet the Tremor springs mentioned above will fit nicely.
And improve the ride, is a cheap set of 1” spring spacers.
ride is improved as a result of 50% more compression travel, stock shocks compadre this change without issue, bottoming over sharper or larger bumps is almost eliminated,
BUT - You then won’t be able to tell people your truck has Tremor suspension…..depends what the goal is here
See if the Tremor track bar is the same length or longer than regular track bars. A one inch front lift will likely shift the axle a half inch, so you would be better with the longer track bar.
This is the second F350 FX4 I've leveled with the 1-1/2" spacer from Ready-Lift. No measurable movement of front axle with this mod. We did the 3" on my sons F-250 and had to add a track bar bracket to center the axel.
This is the second F350 FX4 I've leveled with the 1-1/2" spacer from Ready-Lift. No measurable movement of front axle with this mod. We did the 3" on my sons F-250 and had to add a track bar bracket to center the axel.
That's interesting. My truck has the factory installed snow plow springs, so about one inch lift over base springs, and my truck axle is shifted about 3/8"-1/2" (hard to measure exactly). When I looked it up, I read a one inch front lift shifts the axle a half inch. I purchased a BDS 1"-3" track bar relocation bracket, but have not installed it yet to see. I am concerned with the BDS 1"-3" bracket because both for 1" and for 2", the bracket uses the same hole setting.
i took my 5990lb springs out and swapped in 4800lb tremor springs and gained 1/4 inch. From what ive read, non snow plow trucks get 1.5-2.5 inches of lift.
i took my 5990lb springs out and swapped in 4800lb tremor springs and gained 1/4 inch. From what ive read, non snow plow trucks get 1.5-2.5 inches of lift.
i did add 2 deg caster shims but nothing else.
Curious to hear your first hand experience with going from 5990 springs to the tremor. Any major ride quality difference, for the better or worse?
Curious to hear your first hand experience with going from 5990 springs to the tremor. Any major ride quality difference, for the better or worse?
I think it was well worth it, doesn’t drive like a casually or anything but made it better.
i got the coil springs new from Fairway, I used the VIN from a tremor with the 4800lb springs and I think I paid $310 delivered to my door…was well worth it. I ended up using Carli 2 degree caster shims as well.
i also put in the Carli rear shackles which helped out the rear a little.
I think it was well worth it, doesn’t drive like a casually or anything but made it better.
i got the coil springs new from Fairway, I used the VIN from a tremor with the 4800lb springs and I think I paid $310 delivered to my door…was well worth it. I ended up using Carli 2 degree caster shims as well.
i also put in the Carli rear shackles which helped out the rear a little.
Nice... So no other changes to the front-end? Re-used the same shocks, track bar, etc?
Were the caster shims because the alignment shop recommended them, or you were just being proactive.
Nice... So no other changes to the front-end? Re-used the same shocks, track bar, etc?
Were the caster shims because the alignment shop recommended them, or you were just being proactive.
sorry, I had previously swapped shocks to the cheaper Fox ones, looking back I wish I got the HTO’s. The cheaper Fox didn’t change the stock ride at all, not sure if they compliment the lighter springs.
track bar is the same, figured ford thought mine was good enough an 1/4 inch shouldn’t mess it up too bad.
i got an alignment done by ford after they replaced a bushing under warranty. Caster was around 2.5 and the front end felt a little “light”…the shims make it feel great. I do need to get the alignment checked again.
my end goal is to get a 4ish inch lift in the future, but not sure which direction to go in but this satisfies my needs for now, the snow plow springs were just too rough.
