How much are you sagging? There are a number of 2.5” rear spacers on eBay. Have not seen a 3” rear spacer. 3” in the rear MIGHT be doable if you can find someone to make them (couple of the eBay folks will do custom heights).
Or you could go to a 2” front spacer though may need some trimming for 35s though.
If you have the 3/2 lift theoretically you should not be experiencing a visual sag to the rear.
Did you measure before and after heights? Something else could be awry.
I can only speak to the issues of 4” of lift in the front. At that much length the strut was pretty close to full extension and while there was space between the UCA and the spring it was very minimal.
Hitting bumps that pushed the wheel/suspension up we’re not too bad one could could just tell the strut was being overworked. Hard to describe but the dampening had a very rigid feel not smooth and fluid.
As for holes and major dips, where your wheel/suspension goes down, old on to your butts!
You could hear and feel that strut was way over extended even at slow speeds. At higher speed, I never made it over 60 and usually kept it around 45 and made sure to stay way from holes and the like as much as possible, you could feel the entire corner of the truck drop since there was no more ability for the strut to extend and you would get a pretty serious clunk. I presume the UCA meeting the spring.
You hit a hole in a turn there was zero dampening and your wheel would jerk even further in the direction it was turned.
Couple bad pucker moments for sure when that happened.
Not fun at all and truly not safe. I drove it very very little at 4”.
Granted you have a newer generation but even when I had 4” up front and 2” in the rear I had no noticeable rear end sag. This is still with stock tires.
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