The left side of my 2000 CC XL (1999 chassis) is leaking down on the left rear side. I took it to Luxury coach in Rockwall. I provided the two Norgren air valves that bolt on to the crossmember for them to install. After the installation of the valves and 17 fittings I still have the LR losing air.
Any suggestions where to go from here?
If I drive up on wooden ramps do I need to raise my tag axle?

Thanks,
Norman Martin
2000 CC 60408