I drive a 1999 F-150 with Goodyear Wrangler AT/S Tires. Now the car shakes while drive due to the fact the ribs and blocks are very iregular. Does anybody know if these tires have had production faults in the past ?

 

That happens ALOT with Goodyear. The tires are cupping causing uneven (wavy) tread on the inner or outer portion of the tire. Take it to a shop, get them balanced and cross rotated (X pattern). It should go away sortly after that....then come back again later...

 

My friend has a 99 F150 & has trouble with the AT/S. I also have a set on my 99 Expedition. I had to rotate the fronts to the back because it was pulling heavy to the left. It went away after the rotation but I cannot rotate anymore. My wife came against a high curb & took a chunk out of the sidewall. At that time I was going to replace all 4 instead of buying just the one, but people talked me into replacing the one tire. I will be replacing all 4 after we put some more miles on. The problem with these tires are the
2 grooves & once they cup your screwed.