Truck vibrates at 70-75 miles per hour in the front end.

It has over 200,000 miles and just started doing it couple months ago. Was told front end was out align so got that done, but did not help. Vibrates feels like in the front end. Auto shop says breaks are fine, front end in alignment, tires are rotated and balanced air pressure has been checked. Drives fine until you hit 70 miles per hour and then it will vibrate unless you speed up past 75 then it goes away at any speed past 75, so just does it 70-75 miles per hour. If you stay at 70-75 it will continue to vibrate.

Bearing hubs that are worn should show some play in them if they are worn enough to cause a vibration. The front axles turn but are not under load in 2 wheel drive so I find it unlikely they can cause it. Alignment rarely would ever cause that type of vibration. It stll brings me back to wheels and tires. Do you see a shimmy in steering wheel when it happens? Are they factory wheels? Are the tires new? A after thought is how old are the shocks?

Shocks on back are new, I don't know how old front shocks are. If it was shocks wouldn't it vibrate all the time no matter the speed? The tires are about 2yrs old if that. Yes there is a shimmy in the steering wheel when it happens. I think the rims are factory.

Shocks can allow wheels to bounce if worn. The shocks hold wheels on the road so to speak. There is no such thing as a abosolute perfect balance. Most all wheels and tires will have a vibration at a given speed...shocks help dampen that motion that comes in at higher speeds. Have you ever noticed a car pass by you on the road and the tire was bouncing like a basket ball. When you see that it means that car has bad shock absorber most times. Due to the mileage you say is on your truck, it may be worth the investment to put (good) new shocks on the front before you chase this problem to more exspensive options.

Thanks! Make a lot of sense, I have also a slight delay jerk when idle at light. Any idea of the cost for this repair