Rear End Bumpy 45-55mph

[chefjay]

I have noticed that I have a far amount of hop in the rear end at 45mph to about 55 mph. The tires have been ballanced three times two of which were Road Force..I just had one of the tires replaced and the hop is still there...My Titan is an 04 LE Crew Cab 4x4 with the 18" Rims...Is this ride normal or could there be something else wrong..It has been to two dealers and they tell me it is normal ride... If I noticed this when I test drove it I would nver have bought the truck..also the truck has 7500 miles on it and it did not ride like this when I bought the truck in Sept.Would the helper springs that are used for the clunk help stiffen the ride and not make it bounce so much...Thanks

[HudsonValleyTitan]

I have the OR package with the Bridgestones and 17" rims and have no such problem. I still say those GoodYears are horrible tires.

[mbjkiller]

i get that too... but when i have some extra weight on the truck... the hopping will go away, so i guess its normal for a empty truck