Sadly there are too many shops that are not reading the instructions that come with the lift. Too many pictures of front shocks on the rear, springs on the wrong side.... It not that difficult to do it correct.
OP would be a good idea to check the part#'s on the springs and shocks to make sure...
Sounds like mine on a JLUR. The Mopar shocks are not bad, just wrong valving. My test road at 45mph would kick the rear end out. I no longer have the springs or shocks from the lift on. It's funny as I have a buddy drive it "it's ok". Some of us really want more than others :)
They are rebuildable, not DSC or LSC adjustable. They are a 2.5 internal bypass shock. You would have to go up to a 3.0 from Fox to get internal bypass, as they do not sell the 2.5 I.B. for JL or JT.
These are like new. They were used for height testing. They are a true 1" lift on my JLUR.
https://www.synergymfg.com/synergy-jeep-jl-jlu-jt-front-lift-coil-springs.html?category_id=4980
$125 shipped in US
Will second that. Synergy springs are soft. Just know what you want in a ride before buying springs.
I have a set of 1" lift Synergy springs going to sell.
JL's
3.6 Rubi 660AC Driver 18.25
661AC Pass 18.75
3.0 Diesel 667AD same both sides 19.25
JT's
3.6 Rubi 339AC 17.50
3.6 Mojave 569/570AA 17.50
Know your weight. The 660/661's are soft if you put a winch on the nose. I got 1.5-1.75 lift putting on the 667AD's.