If you’re driving your car and notice it shakes when you put it in gear this could indicate a number of different problems. There are many reasons why your car may be shaking in certain situations and the best way to determine the source of this problem is to visit a mechanic who can run some diagnostics on your vehicle.
One of the most common reasons for a car to shake when in gear is because the transmission or clutch are experiencing problems. This can be caused by a number of things including a worn out clutch, issues with the gear synchronizers, low or contaminated transmission fluid, and other transmission related problems. Depending on the drive type of your car (2WD or 4WD) this issue can also be affected by the transmission transfer case, differential or other issues with the driveline.
Another common reason for your car to shake when in gear is because the engine mounts are wearing out. These are the rubber or metal brackets that hold the engine and transmission to the body of your vehicle and they soak up the vibrations from driving over bumps and potholes.
If the shaking only happens when you engage a gear then this probably indicates that your motor mounts are wearing out and it’s time for them to be replaced. You can check the condition of your motor mounts by looking for loose bolts or cracks in the rubber.