jjvw, I took your advice and measured the rear springs ( 7” on both sides) . I also measured the distance from the bottom of the bump stop to the spring perch where it would strike. About 2” which seems a little short to me but I am less than an amateur when it comes to these things. I have read a bunch of posts that have come up on this. It appears I may need a slightly l
onger spring; maybe 9” to give the mediocre rancho shocks a chance to work efficiently.
After reading a lot of posts, to my thinking, the springs set the ride height and will oscillate at a certain frequency dependent upon the poundage the spring is designed to be (140#, 160# or whatever maybe stock springs) and also how much weight is sprung weight. Then you have the shock which dampens the oscillations and needs to be the right height and made for the application…the Jeep TJ. I welcome everyones input.
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