Hi I have a 2000 mustang v6 that has a major vibration noticed it’s when I’m around 40 mph and around 1500 rpm and more. The vehicle was sitting for three years before I bought it the old owner said the put a new used engine in it that has around 80k. I had the engine mounts checked the wheels balanced, I’m still suspecting the u joints or the drive line but I’m stuck and don’t know if anything I’m overlooking of if anyone has had the problem and hopefully can help I have to take the car on a 425mile drive on the 7th of August so all suggestions will help

thank you for your time

 

check the tires for uneven wear or bulges, as old tires can create issues too, especially after sitting for years. Since the vehicle was previously unused, it might be worth looking into the suspension components as https://tropical-casino.com/ well—things like bushings or shocks could contribute to the problem.