When using the Hi-Lift as a jack to lift a vehicle you’ll need a good square edge to hook it under. Consider this when buying or building bumpers or rocker panel protection. You’ll also want a solid platform to set the jack foot on. If the suspension is extremely flexible you may need to strap the axle to the frame to get the tire off the ground. Put a spare tire under the vehicle as a safety precaution if you need to work under it.