I have a 4x2 Double Cab Prerunner with the Long Bed. when I'm cruisin around town the ride is alright. But when I get on the highway, unless the road is perfectly smooth, as in brand new pavement, my truck starts to really vibrate up and down. It gets so bad on some road it makes my girlfriend nauscous. I can't tell of the backend is jumping up and down or if it is in the front. Either way it is annoying. I thought maybe it was bacause theback end was too light, but I loaded all my tools in the back one day and hauled them over to where I was working and it didn't seem to make a huge difference.
Are there any adjustments I can make, do I need better shocks or something.
Any thoughts are appreciated.