Most of the cars move like a jerk up when accelerating. Below listed are some of the reasons why a car shakes or vibrates when acceleration is applied.
Wrecked Car Mounts: The car mounts act as a shock absorber in the vehicle and soaks up the engine quakes in such a way the passenger does not get the impact. The car mounts connects the vehicle mechanism to the framework of the car body. If there is a wreck in the car mount, the car shakes strongly. Other components of the car are also at risk of losing alignment and damaging because of the wrong positioning of the engine.
This can be repaired by replacing the spoilt car mount with a better one and prevent shaking. But after removing the first one, it keeps damaging and will have to keep changing them.
Broken Internal CV Joint: There is either internal or external CV connection at the edge of every axle. Check if the inner CV joint is broken whenever a car vibrates, even at the earliest stage to prevent the shakes from worsening when the vehicle is loaded. The reason for CV joint breakage is because of the rupture in the connection boot and which makes way for grime to mix with grease. The liquid get seeped into the boot a spoil the lubricant which insulates the metal joints. Without the insulation it will not be able to function and should be replaced.
Lopsided Wheels: When new wheels are installed, the car may start shaking. This could be because the wheels have lopsided, which means that they have to bear different burdens on each of them. When the car moves all the wheels should have equal weights on them. Even a little unequal weight will cause vibration. The shake in the steering will be felt more when the car is at higher speed. Place the vehicle on a balancing device while changing them and add tiny tire weights to make it equal.
Loose Heave Screws: When the tires are over used, the heave screws on tire become loose, which will result in shake in the vehicle while at higher speed, and the major issue is when the defect will result in complete detachment of the screw and the tire will roll off while the car is in motion. To avoid this accident, ensure to have the heave screws checked and make sure it is stable. Tighten the screws with a flexible wrench or wheel iron occasionally to ensure it is safe.
Brake Caliper Wedged: A defected brake caliper will wedge when the brake pad is hit which might result in quake in the car. The quaking of the car is noticeable when it is at 60-70 km per hour. More to it, when you halt the car, a burnt smell from the brake pad will occur. Examine every components of the brake mechanism like pad nuts and piston to find out where the damage is. A little lubrication should be able to fix the wedge if the parts are not damaged.
Twisted Axle and Driveshaft: Twisted axle and driveshaft might happen even when minor accident happens. Inspect the car thoroughly to find any damages. The twisted axle and driveshaft can result in vibration in a car on motion. Fix the axle and driveshaft to stop the car from shaking and prevent any future wrecks.