I am holding off on a four wheel brake service myself. In the spring...before my first longer drive, I will pull all 6 tires and perform a full inspection. The front calipers are going to get swapped and new pads to replace the current. The rears will be inspected and I will determine by visual inspection if they are getting serviced. I am under this MH about 5 times a season....painting and inspecting....so i know it very well. Last season I added some new steering goodies and am pleased to say...my junk yard shopping paid off. Been scouring the junk yards in my area looking for suspension improvements systems for my rig...found a set. Steer Safe system works well in my RV....looking now for a rear chassis stabilizer.