If you already have the springs on the car and are only replacing the RTABs then you can make marks on the arm & bracket as to where it is currently sitting (must be done on a level surface with all wheels on the ground. When it comes time to tighten the RTAB bolt, align it to the marks you made and then tighten. Not the most accurate, but, with non stock springs it's difficult to get the right preload. This is the whole reason I went with polyurethane RTABs! No need to adjust preload.
Last edited by scottjoh; 06-11-2012 at 07:43 PM.