One problem related to tire valve has been reported for the 1999 Ford F-250. The most recently reported issues are listed below.
This may be important on finding out why these tires are blowing. One of my tires blew out. But on the other two the valve stems were leaking air after driving a short distance (each at different time). When we stopped the truck we noticed the tire leaking air and had a flat in a matter of minutes (no we didn't hit or run over anything in the road). This leaking valve stems have made me believe that is why bridgestone keeps saying the tires are under inflated. I believe the stems start leaking as you are driving which in turn causes the blow out. We were lucky with the last two tires that went flat, as we were on surface streets and not on the freeway. ( dot number: exbm14480- tire size: lt23575r16 ).