A car may shake at 55 mph due to several factors, including unbalanced tires, misalignment, or worn suspension components. Uneven tire wear or damage can also lead to vibrations at higher speeds. Additionally, issues with the drivetrain, such as a failing driveshaft or worn-out engine mounts, can contribute to the shaking sensation. It's advisable to have the vehicle inspected by a professional to identify and resolve the issue.
balance the tires
You have a tire or tires out of balance.best to get tires road force balanced.
two possibilities: loose motor mounts or contaminated gasoline. In addition, if you are saying it shakes going down the road at around 55 mph then you may have a tire out of balance, or a bent wheel.
When your car is traveling at a constant speed of 55 mph, your body inside the car is also moving at 55 mph relative to the car. This is because you are moving along with the car, experiencing the same speed as the vehicle you are in.
55 mph (!)
If the rotors are warped it can cause a shake when you hit the brakes.
Need more info. Does just the engine run rough or does the steering shake or does the whole vehicle shake betwen 50 and 55 mph?
Yes, but any faster and you'll eventually hit the car in front of you?
Sure. If there are mud and rocks in the rim, the SUV can shake at speeds lower than 55 mph. Check the rim to see if there's anything in there that shouldn't be there.
55 mph. If the car stops (impact) people inside are still moving at 55 mph. They will hit the inside of the car- at 55 mph. That has the same effect as if you were standing still, and were hit by a car moving 55 mph. Messy. Wear your seatbelt.
Most common reason is improperly balanced wheels, next would be alignment but that usually causes a pull to the left or right.
Stopping Distance = about 206.25 feet at 55 mph