The early Bronco's suspension surprises people who haven't studied it. The front end is not the twin I-beam (TTB) system that showed up in the full-size Bronco in 1980 — the first-gen runs a solid Dana 44 front axle on leaf springs with radius arms. The rear is a solid axle on leaf springs. This is a conventional, well-understood setup that responds predictably to lift modifications.
The platform is also relatively short-wheelbase, which amplifies the handling effects of lift height. A few inches of lift changes things noticeably; more than 6 inches requires rethinking suspension geometry entirely. Know what you're building before you start.
Lift Options by Height
2"
Shackle kit — bolt-on
Longer rear leaf spring shackles and spacers give a modest lift with minimal geometry impact. Clears 33-inch tires. Works well for street-primary trucks that see occasional trails. Keep shock travel in mind.
Parts: $150–$350
4"
Lift springs — moderate build
Longer leaf springs front and rear. Clears 35-inch tires comfortably with appropriate trim. At this height, bumpsteer starts becoming a factor on the front end — check drag link angle. Alignment after lift is mandatory.
Parts: $600–$1,200
6"
Long-travel springs — dedicated build
Territory for trail-first builds. Clears 37-inch tires. Bumpsteer correction, extended brake lines, and geometry adjustments are required — not optional. Drive quality on pavement degrades meaningfully without careful shock and geometry tuning.
Parts: $1,500–$3,500
SOA
Spring-over-axle
Moving the axle above the springs instead of below adds 4–6 inches for the cost of spring repositioning. Taller, more articulation. Requires careful geometry work. Budget for extended brake lines, adjustable track bars, and shock relocation.
Parts: $800–$2,500
Spring-Over-Axle (SOA)
The spring-over conversion repositions the leaf springs from below the axle tubes to above them — effectively adding the axle diameter's worth of lift for free. On a first-gen Bronco it typically yields 4–6 inches of additional height and dramatically improves articulation by allowing the axle to droop further.
It's not a beginner modification. Brake lines need to be extended (safety-critical — this is not a shortcut). The front caster angle changes when the axle pivots forward, which affects steering geometry and requires correction. Anti-rotation links or adjustable radius arms become necessary to control axle wrap under power. Do it right or don't do it.
Solid Axle Swap (SAS)
Some Broncos already have solid front axles from the factory — but the SAS in the early Bronco context usually refers to building a custom suspension system that improves geometry over the factory setup. On trucks that have been modified with coilovers or link suspensions, this becomes a significant fabrication project.
A properly executed full SAS with coilovers, upper and lower links, and an aftermarket front diff carrier runs $5,000–$15,000 in parts alone before labor or installation. This is competition-level suspension. Evaluate whether you're building a trail truck or a show rig — the answer changes the build strategy completely.
Cost reality check
A full-tilt SAS with quality coilovers, links, and an ARB locker can cost more than the truck you bought. Know the endpoint before you start cutting. A well-sorted leaf spring truck with fresh shocks, correct gearing, and a locker will out-perform an unfinished link suspension on most trails.
Shackle Reversal Kits
Stock early Bronco rear spring shackles are rear-facing. A shackle reversal kit flips them forward, changing how the rear suspension loads under braking and acceleration. The effect varies by build and driving style — it tends to improve stability under braking but can change the axle's behavior on bumps. It's a low-cost experiment ($150–$300) that many first-gen builders try. Results are mixed enough that it's worth researching opinions from people with your specific tire size and use case.
Shock Options
Bilstein 5100 series is the baseline for any serious build. Monotube construction, excellent heat management for trail use, available in multiple travel lengths for lifted applications. This is where to start if you're not sure — the 5100 improves on stock dramatically and is appropriately priced at $80–$120 per shock.
Fox 2.0 series steps up to reservoir shocks for better sustained performance on rough terrain. Good upgrade for frequent off-road use. Budget $200–$300 per shock.
King 2.5 bypass or coilover is the serious-build shock for built trucks running big lift. If you're spending this much on shocks you already know what you're doing. $400–$800+ per unit.
Steering at Lift Height
Lift changes the relationship between the drag link, tie rod, and steering box — and not always favorably. The result is bumpsteer: the front wheels toe in or out as the suspension travels, making the truck wander at trail speed and adding instability on highway. A high-steer conversion (addressed in the Dana 44 guide) corrects the worst of this above 4 inches by moving the tie rod to a geometry-correct position above the axle centerline.
Verdict
4 inches of lift on quality springs with a set of Bilstein 5100s and a high-steer kit is a complete, capable setup for most first-gen Bronco builds. Go further only if you have a specific trail objective that demands it — and budget accordingly for the geometry work that has to go with it.