Gauge complexity by reviewing the product's installation instructions and installation notes, viewable from its landing page.
The majority of factory trucks and SUVs sit approximately two inches high in the rear when unloaded, so the vehicle’s rear ride height will not be excessively low when the truck is loaded. With most people that lift their vehicles, load and towing capacity are not priorities; performance, tire clearance, and vehicle appearance are key. Contact Superlift if your lifted vehicle will be used for hauling or towing considerable loads. We may suggest a “custom build” with different rear components than what is included in the base lift kit.
This varies, depending on application, although realignments should be part of your regular maintenance regimen to ensure proper handling and tire wear. For vehicle-specific information, review the product's installation instructions, viewable from its landing page.
The Specialty Equipment Market Association (SEMA), an organization that works on behalf of automotive aftermarket manufacturers, has a complete list of your rights regarding warranties and aftermarket equipment. In order to refuse a warranty claim, the dealership must be able to prove that aftermarket parts caused the issue.
The general rule is that lifting a vehicle increases its center of gravity, although it is not unusual for moderately lifted vehicles, with moderately taller and wider tires/wheels, to be more stable than their stock counterparts; go "wide" as you go "tall". Always drive responsibly. Take time to learn your modified vehicle's new capabilities and limitations. Most newer model vehicles are factory-equipped with an Electronic Stability Control Program; Superlift Lift Kits are compatible with the various ESC systems.
As suspension lift designers, we work within the limitations of the factory platform. For example, an older leaf sprung General Motors truck can be lifted up to 12", and depending on its drivetrain, easily handle 40"+ diameter tires. Conversely, Independent Front Suspension designs are limited to more moderate lift heights and tire sizes due to their less robust steering systems and axles. Generally speaking, if Superlift does not offer a kit as tall as you think you need, you probably shouldn't go there.
Taller tires effectively lower a vehicle’s gear ratios, but at what point (tire size) does this become a noticeable detriment to performance and fuel economy? There is no single answer. Most vehicle models are available with different axle ratios. with the ratio tied to a specific engine size, whether the vehicle has a towing package, etc. If you haven't purchased the vehicle yet, buy a vehicle with as low a gear ratio (numberically higher) as possible, Other "rule of thumb" generalities... Full-size vehicles with gas engines can satisfactorily run up to a 35" tire with most factory gearing. Diesel vehicles, due to their additional torque, can satisfactorily run even larger tires.
Driveline correction is incorporated into virtually all Superlift lift kits. Rear lift blocks are either tapered or flat, depending on application, to address driveshaft angle. Replacement springs have a tapered degree shim attached, where applicable, to accomplish the same result. In certain applications, differentials, are re-timed for proper angle, and to restore shaft spline engagement. Sometimes, lift block pins and holes are offset to address shaft length issues. With lifts over 6", driveshafts may require lengthening, or driveshaft spacer; review the product's installation instructions and installation notes, viewable from its landing page.