1946-1986 Jeep [ sub header] CJ series * M38A1 All CJ series vehicles have solid axles suspended by leaf springs. Lift is achieved by replacing the four springs. Superlift’s stated lift height is based on factory ride height. If your Jeep is still equipped with its original suspension (the factory springs have not been replaced or refurbished), the springs have obviously settled and lost some of their factory ride height. On these Jeeps it is not unusual to achieve an additional inch or so of lift above Superlift’s stated lift height. Superide springs have proven to stand up to serious use, even on vehicles equipped with a V-8 and / or winch, while providing a great ride. Superide leafs also provide increased articulation in the rough stuff to keep the tires in contact with the ground. Also, take time to closely inspect all of your vehicle’s suspension-to-frame attachment points, and its entire steering and brake systems for signs of wear and / or fatigue.