Lifting a 1999 Jeep Cherokee (XJ) involves installing aftermarket suspension components to increase ground clearance and accommodate larger tires for off-road performance. Most owners choose lift heights between 2 and 6 inches, which requires modifying coil springs, leaf packs, shocks, and often driveline components like the slip yoke and driveshaft to ensure mechanical reliability and safety.
The 1999 Jeep Cherokee XJ remains a hallmark of the off-roading community. Known for its lightweight unibody construction, solid Dana 30 front axle, and the legendary 4.0L inline-six engine, it serves as an ideal platform for modifications. As of 2026, these vehicles have transitioned from affordable "beaters" into sought-after classic 4x4s. However, lifting an XJ is not as simple as swapping springs. To do it correctly, one must understand the geometry of the suspension, the limitations of the driveline, and the inevitable trade-offs in highway handling.
Understanding the XJ Suspension Architecture
Before selecting a lift kit, it is vital to understand what makes the 1999 model unique. The XJ uses a "Quadra-Link" front suspension—a five-link design consisting of four control arms and a track bar. The rear utilizes a traditional leaf spring over axle (SOA) setup.
The 1999 model year is particularly favored because it features the high-output (HO) engine and, in many cases, the Chrysler 8.25-inch rear axle, which is significantly stronger than the Dana 35 found in earlier or non-ABS models. However, 1996–2001 models feature a "sealed" output shaft on the transfer case, which makes them more susceptible to driveline vibrations when lifted compared to pre-1996 versions.
Choosing the Right Lift Height
The "best" lift height depends entirely on your intended use. While a 6-inch lift looks aggressive, it introduces complex geometry issues that can make a daily driver feel unstable.
2-Inch "Budget Boost"
A 2-inch lift is often achieved using polyurethane coil spacers in the front and longer shackles or an "Add-a-Leaf" in the rear.
- Pros: Inexpensive, retains factory ride quality, and usually does not require new control arms or driveline modifications.
- Tires: Allows for 30-inch tires with no trimming, or 31-inch tires with minor plastic trimming.
- Best for: Light trails and maintaining a daily-driver feel.
3-Inch Suspension Lift
This is considered the "sweet spot" for many XJ owners. It typically includes new front coil springs and full replacement rear leaf packs.
- Pros: Significant increase in ground clearance; accommodates 31-inch tires easily.
- Requirements: You will likely need longer shocks and an adjustable track bar to recenter the front axle.
- Driveline: On a 1999 model, a 3-inch lift may introduce minor "driveline vibes." A transfer case drop kit (lowering the crossmember about 1 inch) can often resolve this.
4.5-Inch to 6-Inch "Long Arm" Lifts
At this height, the XJ becomes a serious rock crawler. However, the factory "short arm" control arm geometry becomes too steep, leading to a harsh ride where every bump is transmitted directly into the unibody.
- Pros: Massive flex and clearance for 33-inch or 35-inch tires.
- Technical Depth: Requires "Long Arm" kits that relocate the control arm mounting points further back on the frame.
- Necessities: A Slip Yoke Eliminator (SYE) and a custom CV driveshaft are mandatory at this height for a 1999 XJ.
Essential Components and Technical Considerations
Lifting a vehicle changes the relationship between every moving part in the drivetrain. To avoid the dreaded "Death Wobble" or mechanical failure, focus on these specific areas:
The Track Bar and Axle Centering
The track bar anchors the front axle to the body. As the body rises during a lift, the track bar—which is a fixed length from the factory—pulls the axle toward the driver's side. Even a 2-inch lift will shift the axle noticeably. An adjustable track bar is essential for any lift over 2 inches to ensure the tires track straight and the steering geometry remains centered.
Control Arms: Fixed vs. Adjustable
Factory control arms are made of stamped steel and use soft rubber bushings. When you lift an XJ, the angle of these arms increases, which can pull the axle toward the rear of the wheel well and alter the "caster" angle.
- Caster Angle: This is the tilt of the steering axis. If the caster is too low due to a lift, the Jeep will "wander" on the highway and feel twitchy. Adjustable control arms allow you to push the axle back to its proper position and dial in the caster for stability.
The Slip Yoke Eliminator (SYE)
The 1999 Jeep Cherokee uses a slip yoke on the NP231 transfer case. As the distance between the transfer case and the rear axle increases, the angle of the driveshaft becomes too steep for the factory U-joints to handle. This results in a persistent roar or vibration. An SYE kit replaces the output shaft of the transfer case with a fixed yoke. This allows the use of a "double-cardan" (CV) driveshaft, which can operate at much steeper angles without vibrating. For a 1999 model, this is the gold standard for driveline health.
Braking and Steering
Larger tires and higher centers of gravity put more strain on the factory systems.
- Brake Lines: At 3 inches of lift or more, the factory rubber brake lines will be stretched to their limit when the suspension "flexes" (drops) off-road. Extended stainless steel braided lines are a necessary safety upgrade.
- Steering Linkage: The factory "inverted T" steering is prone to "tie rod roll" and can be weak when pushing 33-inch tires. Many owners upgrade to the steering linkage from a Jeep Grand Cherokee (ZJ) V8 model, which features a solid steel tie rod that is a direct bolt-in for the XJ.
Wheel and Tire Fitment Guide
Selecting the right tire size is the primary reason most people lift their 1999 XJ. The following table outlines the typical requirements for various tire sizes on a 1999 Cherokee.
| Tire Size | Lift Required | Trimming Needed? | Recommended Gearing |
|---|---|---|---|
| 235/75R15 (29") | Stock / 2" | None | 3.55 (Factory) |
| 30 x 9.50 | 2" | None | 3.55 (Factory) |
| 31 x 10.50 | 3" | Minor (Flares) | 3.55 or 4.10 |
| 32 x 11.50 | 4" | Moderate | 4.10 |
| 33 x 12.50 | 4.5" - 5" | Major / Aftermarket Flares | 4.56 |
| 35 x 12.50 | 6"+ | Extensive / Sheet Metal Cut | 4.88 |
Note: Gearing recommendations are based on the 4.0L engine and AW4 automatic transmission to maintain highway usability and fuel efficiency.
Addressing "Death Wobble"
Death wobble is a violent, self-sustaining oscillation of the front axle, usually triggered by hitting a bump at speed. It is common in lifted XJs but is rarely caused by the lift kit itself. Instead, the lift kit amplifies existing wear in the steering components.
If you experience this after lifting your 1999 Cherokee, check the following in order:
- Track Bar Bolt: The most common culprit. If the hole on the axle bracket is even slightly ovaled, the axle will shimmy.
- Tire Balance: Even a slightly out-of-balance 33-inch tire can trigger a wobble.
- Alignment: Specifically, ensure you have enough positive caster.
- Control Arm Bushings: Worn rubber bushings allow the axle to move independently of the frame.
Cost and Maintenance in 2026
In the current year 2026, many of the premier XJ lift manufacturers (such as Old Man Emu, IRO, and Rubicon Express) have refined their kits. A basic 3-inch lift kit might cost between $800 and $1,200, while a complete long-arm system with an SYE and driveshaft can easily exceed $3,500.
Maintenance on a lifted 1999 XJ requires more diligence than a stock vehicle. You should grease your U-joints and suspension bushings every 3,000 to 5,000 miles, especially if you submerge the vehicle in water or mud. Furthermore, check the torque on your U-bolts (which hold the rear leaf springs to the axle) after the first 500 miles of driving, as they often stretch initially.
Common Mistakes to Avoid
- Using Blocks in the Rear: Avoid using lift blocks between the leaf spring and the axle. On an XJ, this causes "axle wrap," which can snap leaf springs or damage the driveshaft during acceleration. Always prefer full replacement leaf packs.
- Ignoring the Bump Stops: When you install larger tires, they can travel up into the fender well and tear off your plastic flares or damage the metal. Installing extended bump stops limits the upward travel just enough to save your bodywork.
- Stock Shocks with a Lift: Never use stock-length shocks with a lift. They will act as the "limit strap" for your suspension, meaning the shock will fully extend and eventually rip its mounting bar-pins off when you hit a pothole.
Frequently Asked Questions
Can I lift my 1999 Cherokee without a Slip Yoke Eliminator (SYE)?
Yes, you can generally go up to 2 inches without one. At 3 inches, you might need a transfer case drop (lowering the crossmember with spacers). However, the drop reduces ground clearance, which defeats part of the purpose of a lift. For any lift over 3.5 inches on a 1999 model, an SYE is strongly recommended to prevent long-term transmission and transfer case damage.
Will lifting my Jeep affect its towing capacity?
While the engine remains capable, the higher center of gravity and larger tires make towing more dangerous. Braking distances will increase significantly. If you plan to tow, ensure you have upgraded your brakes and are using a lift kit with a higher spring rate to prevent excessive rear-end sag.
Do I need to re-gear my axles after lifting?
If you stay with 30-inch or 31-inch tires, the factory 3.55 gears (found in most automatics) are acceptable. If you move to 33-inch tires, the Jeep will feel sluggish, the transmission will hunt for gears on hills, and your fuel economy will plummet. Re-gearing to 4.56 is the standard solution to restore factory-like performance.
What is the difference between an "Add-a-Leaf" and full leaf packs?
An Add-a-Leaf is a single steel leaf inserted into your existing pack. It is cheaper but often results in a very stiff ride and eventually causes the old factory springs to sag around it. Full leaf packs replace the entire assembly and provide a much better ride quality and more consistent lift height.
Is a 1999 Cherokee XJ safe to drive on the highway once lifted?
A properly lifted XJ with correct caster angles, a solid track bar, and balanced tires can be driven at highway speeds comfortably. However, it will never handle like a modern SUV. The steering will be slower, and the vehicle will be more sensitive to crosswinds due to its "brick-like" aerodynamics.
Final Recommendation
For the majority of 1999 Jeep Cherokee owners, a 3-inch suspension lift using full leaf packs and an adjustable track bar provides the best balance of off-road capability and street manners. This setup allows for 31-inch tires, which offer a significant boost in traction without requiring expensive re-gearing or extensive body cutting. Always prioritize high-quality bushings and steering components to ensure that your classic XJ remains a joy to drive both on and off the pavement.
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