What a 4-inch lift does to your Ram 1500

A 4-inch suspension lift raises the frame of your Ram 1500 by 4 inches, which increases ground clearance under the truck and allows you to fit larger tires. The lift works by replacing your factory springs, shocks, and sometimes control arms with aftermarket components that sit taller. Your truck will sit noticeably higher, and the ride height change affects how the truck handles, what tires fit, and how much weight it can safely carry.

The lift does not change the truck's engine, transmission, or towing capacity in the way those are rated. It does change the angle at which your driveshaft and suspension components operate, which is why a 4-inch lift is considered moderate — large enough to be visible and functional, but not so extreme that it creates serious mechanical problems if installed correctly.

Key Takeaways

  • A 4-inch lift replaces your factory springs and shocks with taller components, raising your frame 4 inches off the ground.
  • The lift allows you to fit tires up to about 35 inches tall, depending on your Ram 1500 generation and whether you modify the fender.
  • Lifting changes suspension angles, which can wear CV joints and transfer case components faster if not addressed with a driveshaft angle correction kit.
  • A 4-inch lift typically costs between $1,500 and $4,000 installed, depending on component quality and whether you add a driveshaft kit or other modifications.
  • After lifting, you will need a wheel alignment and should have your speedometer recalibrated if you install larger tires.

How the lift components replace your factory suspension

Your Ram 1500 comes from the factory with coil springs (or air springs on some models) that support the truck's weight and absorb bumps. A 4-inch lift kit replaces these springs with taller coil springs or, in some kits, a combination of springs and spacers. The shocks are also replaced with longer shocks that can extend and compress through the greater range of motion the taller springs allow.

Some 4-inch kits also include new control arms or adjustable control arm brackets. These keep the suspension geometry closer to factory angles as the truck sits higher. Without these adjustments, your suspension arms would point at odd angles, which accelerates wear on ball joints and tie rod ends. The specific components in your kit depend on whether you choose a coil-over kit, a spring-and-spacer kit, or an air suspension kit — each has different costs and ride characteristics.

Tire size and ground clearance changes

A 4-inch lift typically allows you to fit tires up to 33 or 35 inches tall without rubbing the fender or frame, depending on your Ram 1500 generation and wheel width. Factory Ram 1500 tires are usually 28 to 32 inches tall. Going from a 32-inch to a 35-inch tire adds another 1.5 inches of ground clearance, so your total clearance gain is roughly 5.5 inches when you combine the lift and the larger tire.

If you want to fit 35-inch tires without trimming the fender, you may need to add a small amount of negative offset to your wheels (moving them outward) or use a slightly narrower tire width. Rubbing the fender at full suspension compression — like when you hit a pothole or load weight in the bed — is the most common problem after a lift, and it usually means either the tire is too tall, the wheel offset is wrong, or the fender needs trimming. Before you buy tires, confirm with the lift kit manufacturer what size they tested with your specific Ram generation.

Driveshaft angle and wear on drivetrain components

When you lift your Ram 1500, the angle between the transmission output and the rear differential changes. This angle is called driveshaft angle, and it affects how hard the CV joints and U-joints work. A 4-inch lift can increase this angle by 3 to 5 degrees, which is noticeable but manageable if you address it.

The most common fix is a driveshaft angle correction kit, which adjusts the angle of the transmission or rear differential to bring the driveshaft closer to parallel. Without this kit, your CV joints and transfer case bearings will wear faster, and you may hear vibration at highway speeds. A driveshaft kit typically costs $300 to $800 and is considered essential for a 4-inch lift on a Ram 1500. Some lift kits include it; others sell it separately. Ask the manufacturer whether it is included before you buy.

Alignment, speedometer, and brake line adjustments

After a lift is installed, your wheel alignment will be out of spec. The suspension geometry has changed, and your wheels will toe in or out incorrectly, which causes uneven tire wear and pulls the truck to one side. You must have a full four-wheel alignment done at a shop that has experience with lifted trucks — not all shops are set up for this. Expect to pay $150 to $300 for the alignment.

If you install tires larger than your factory size, your speedometer will read slower than you are actually going. A 35-inch tire on a truck that came with 32-inch tires means your speedometer will read about 9 percent low. You can recalibrate the speedometer through your truck's instrument cluster menu (on newer Ram 1500s) or with an aftermarket speedometer corrector module. Some shops include this in the lift installation; others charge $100 to $200 for it.

A 4-inch lift may also require brake line extensions if the suspension travel increases enough that the factory brake lines become too short at full compression. Most kits include these, but confirm with the manufacturer. Brake lines that are too short will pull the brake pads off the rotors or rupture, which is a safety issue.

Cost, labor, and installation time

A 4-inch suspension lift kit for a Ram 1500 costs between $800 and $2,500 depending on the brand and components. Budget brands like Rough Country or ReadyLift run $800 to $1,200. Mid-range kits from brands like BDS or Fabtech run $1,500 to $2,000. High-end kits with adjustable dampers or air suspension run $2,000 to $2,500. Installation labor typically runs $500 to $1,500 at a shop, depending on whether the shop has to remove the bed (some kits require it) and whether you add extras like a driveshaft kit or brake line extensions.

Total installed cost for a basic 4-inch lift is usually $1,500 to $3,000. If you add a driveshaft kit, new wheels and tires, alignment, and speedometer correction, the total can reach $4,000 to $5,000. Installation takes one to three days depending on the kit and the shop's schedule. Some shops can do it in one day; others need two. Ask before you drop off the truck.

Ride quality, handling, and payload capacity changes

A 4-inch lift raises your center of gravity, which makes the truck sit higher and feel less stable in hard cornering compared to stock. The effect is noticeable but not dangerous if the kit is installed correctly and your tires are appropriate for the weight. Stiffer springs also mean a slightly firmer ride over bumps — you will feel more of the road than you did with factory springs, especially on rough terrain.

Payload capacity (the weight you can safely carry in the bed) may decrease slightly with a lift because the springs are stiffer and the suspension geometry has changed. Check your lift kit manufacturer's payload rating — it is usually within a few hundred pounds of stock, but some kits reduce it by 500 pounds or more. Towing capacity is typically unaffected by a 4-inch lift, but confirm with the manufacturer and have your truck re-weighed if you regularly tow near the limit.

Frequently Asked Questions

Will a 4-inch lift void my Ram 1500 warranty?

Ram's factory warranty does not automatically void when you lift the truck, but it may not cover suspension or drivetrain damage that results from the lift. If a component fails and Ram can prove the lift caused it, they can deny the warranty claim. Suspension components, shocks, and springs are usually not covered after a lift. Engine and transmission coverage typically remains intact unless the lift caused the failure.

Can I install a 4-inch lift myself?

A 4-inch lift requires removing the wheels, springs, shocks, and sometimes control arms — work that needs a lift or jack stands and specialized tools. If you have suspension experience and the right equipment, you can do it. Most people take it to a shop because the alignment and driveshaft angle work require professional equipment. A shop installation is safer and usually worth the cost.

What is the difference between a coil-over kit and a spring-and-spacer kit?

A coil-over kit replaces the factory springs and shocks with new coil springs and adjustable shocks in one unit, giving you more control over ride height and damping. A spring-and-spacer kit uses a spacer to lift the truck and keeps the factory shocks (or replaces them separately), which is cheaper but less adjustable. Coil-overs ride better and last longer but cost $500 to $1,000 more.

Do I need a driveshaft kit with a 4-inch lift?

A driveshaft angle correction kit is strongly recommended for a 4-inch lift to prevent premature wear on CV joints and transfer case bearings. Some kits include it; others do not. Without it, you may hear vibration at highway speeds and experience faster component wear. Ask the lift manufacturer whether it is included before you buy.

How often do I need to service a lifted suspension?

Lifted suspensions need the same service intervals as factory suspensions — shocks typically last 50,000 to 80,000 miles, and springs last much longer. Have your alignment checked every 10,000 to 15,000 miles if you drive on rough terrain, because lifts can shift alignment faster than stock. Inspect ball joints and tie rod ends annually for wear.