Tom- I'll give you my $.02 because you keep asking on other threads.
Some hate the air ride because they have had habitual probs with sensors and poping bags.
I personally love it. Its great when towing or when I add a bunch of weight to the rear end (gear + a hitch mounted dirt bike). It does improve clearance and departure angle when offroading. I also like the compressor for airing up tires (it does take a while to do 37s).
In 50K miles and 3+ years I have had one sensor fail. The truck was still drivable but is sagged like hell in the rear on one side. It was a 15 min fix at the dealership.
Ultimately, springs are simpler and probably more failsafe. You choose.
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