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What do you think of a softer shock coupled with air bags. I had the adjustable ranchos on my 85 but my mechanic thinks air bags would be good for my 98 when I want to tow.

All I know about air bags is based on a former regular member here from years ago (Sherpa) on his stock height '98? 4Runner. He replaced the rubber cone bumpstop inside the coils by adding airbags inside his rear coils so he wouldn't get the annoying bottoming-out when driving over dips in the road when the axle hit the hard bump stops. He said it was a huge improvement and fixed the problem of bottoming out. I don't know how much (or if) it changed the ride otherwise. So, yeah it might be good for towing.