because I have a stock XJ next to it, rancho shocks.
Then 7" of lift on the other XJ on trailmaster shocks.
I can stand on the back bumper of the stock, jump up and down and damned near bottom them out (stock packs) with me about 210lbs and jumping pretty hard.
I can stand on the back bumper of the lifted XJ and jump up and down in the same manner and it barely moves 2-3" or so max. They're VERY stiff if you use the whole pack, which is why I said I was switching the pack around. Going to use the 4.5" main leaf I have, with 2 S10 leafs and the overload leaf, then with 1" shackles and .5" ubolt eliminators I should sit at the same height and not be quite as stiff as now with a lot more flex.
Here's another example. When going over large speed bumps my rear end no longer absorbs the speedbump over about 5mph. It falls off and bounces. I know this cause if I keep my foot on the gas I get a blip in the speedy pedal when the tire loses traction.
'94 XJ - 8" Long arms, 9" rear, 35's