I have a 1996 F250 7.3 super cab 6foot bed Firestone tires 80psi Pulling 27 travel trailer.. The ride is terrible on California freeways That are concrete. Asphalt ride is wonderful. Dog won't ride with me and soon to lose wife. Any suggestions to smooth out the ride.

 

Nothing you can do about it.

However, I think the 3/4 tonners run at 55/60 PSI - check your certification label to verify.

Concrete was phased out in favor for the asphalt for that very reason.