oh yeah. I think a local shop with an Autologic scanner is capable of doing the same. ....won't be as much.

 

Before you go and spend some hard earned money, go fill a spray bottle with some soapy water, crawl under the truck, listen and watch as you spray the lines and bags.
125,000 is too many miles of one set of bags, I would not rule them out as not being the problem.
I also wouldn't be too quick to jump to a coil conversion, the ride and the whole manerism of the truck will change, especially off road.

 

Well I don't want to get rid of the bags I will try to fix them replace them whatever I need to do first if I throw some money in it and it don't fix it I will think coilover but for now I love my bags but here is something to think about. I was standing beside the rover after I parked it and I heard a loud hiss so I get under it and the bottom of the passenger bag is leaking down and within a minute or two its on the ground. I could put my finger over the bag and it would stop hissing like there was a hole but I could start it back up and it would not leak any. So how does a hole go and come and would a hole in one bag make the whole rear end leak down over time because the passenger side comes down then the drivers side does slowly but never as low as the passenger side. It did this another time tonight also and I would climb under it and the same place was leaking but every other time I parked it wouldn't leak a all.

 

Time for air bags, and hey, they are on sale.
http://www.arnottindustries.com/part...id4_pid48.html
Let me know if I can help you with changing them out, it is pretty easy.

 

Mike, thanks for the link! The price for a pair of bags is lower than the coil spring replacements, you get to keep the original design, and they are guaranteed for life! What more could one reasonably ask for ?