But it does.
Using a programmer to tell the computer you've changed tire sizes affects speedometer accuracy, odometer accuracy, AND transmission programming.
It was a noticeable difference for me just going from 31's to 33's. 100% necessary when going to 35's.
No you're right, everyone on here says 4.10's are fine with 35's. And Jeep themselves just puts 4.56's on 35's on the Wrangler XR, not even all the way to 4.88.
Have you used a programmer to tell the computer you're on 35" tires? That's a key part of the equation.
If your phone is plugged into your Jeep and using CarPlay/Android Auto, it won't show phone GPS speed, it'll show speed reading that the Jeep is sending to it.
I could tell a distinct difference when reprogramming for my change to just 285/70R17, so I can't imagine you wouldn't need to do yours.
I think he understood; he's answering your question. If you want the halos and DRL's to work, the new Jeep will need a wiring harness. He's suggesting that instead of doing all the work twice and having to source that harness, just leave the originals on your old Jeep and get the complete Mopar...
It is possible to do it without loosening the control arm bolts, but you shouldn't.
Not knowing any better, I initially did mine without loosening the control arm bolts, and I had to get a bigass pry bar to get the rear springs in. I only got like 1/2" of height.
I re-did it by loosening all...
Ain't no loophole. Jeep is up front about it. The presence of aftermarket parts and modifications is serving a warranty denial opportunity to them on a silver platter.