Greetings, I have a 2000 4-Runner Limited 4x4 with the center diff lock & rear diff lock. I also own a 1999 4-Runner SR-5 4x4 (no locks) and have noticed that it sits about one inch higher than the 2000. Both are stock vehicles and it sticks in my mind that I read somewhere on the internet some time ago that Toyota lowered the 4-runner a little starting in the 2000 year with with the change coming from the size of spring. I like the higher clearance the 99' offers and would like to bring the 00' up to that spec. The question is: Are there any other modifications to the suspension or steering control that would be affected? In other words, will purchasing a set of 99' springs do the job? Any advice would be appreciated. Thank you.