Q: It has a shimmy at about 45-50 mph

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The truck has a shimmy when going about 45 to 50 mph

My car has 240000 miles.
My car has an automatic transmission.

Hi there:

Steering wheel vibrations at the speed you’ve indicated is typically caused by tire and wheel balance or lower ball joints that may be loose. Over time, the wheels and tires will fall out of balance; especially if the tires strike a curb, pot hole or are constantly driving off road. This will typically cause the steering wheel to vibrate slightly as speed increases and usually shows up around 45 to 50 mph. To be sure it’s the balance, you should have a mobile mechanic complete a car is vibrating inspection; so they can pinpoint the precise source of the vibrating issue you’re experiencing.

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