Going through and fixing air leaks and the air system is now within DOT compliance. We replaced the air leveling valves, air dryer, pressure protection valves, suspension pressure switch, air tank drain valves, drive axle brake chambers and hoses. We also replaced the front axle (4) airbags and drive axle (4) air bags. Replaced the all (6) slack adjuster ratchet pawls with new button style.

Buttons for slack adjusters:
https://www.truckspring.com/products/...

Pressure protection valve:
https://www.finditparts.com/products/...

Leveling Valves (same as original):
https://www.finditparts.com/products/...

Pressure Switch (5 pack):
https://www.finditparts.com/products/...

Drive axle brake chamber 30/30:
https://www.finditparts.com/products/...

1/2” x 40” Brake Hoses:
https://www.finditparts.com/products/...