I have a 2000 ford f-250 ext cab. Last week one of the tires was a little low on air so i filled it to 80psi (max recomended PSI) along with all the others to get them all the same. Soon after i noticed That the tires became very noisy.... My dealership told me that noise was normal... It just started making this noise after i put air in the tires. What Psi do you recomend i put in the tires? Thax for your help!