1. Wheel Balance and Alignment:
* Problem: Uneven weight distribution in the wheels (imbalance) or misalignment of the wheels (toe, camber, caster) are common causes of shaking. Even new tires can be improperly balanced.
* Solution: Get a professional wheel balancing and alignment check. This is the first and most likely culprit you should investigate after suspension work.
2. Tires:
* Problem: Worn, damaged, or improperly inflated tires can cause vibrations. Look for:
* Uneven wear: Indicates alignment or suspension issues (even if recently fixed, something might still be slightly off).
* Bulges or damage: Compromises tire integrity and causes vibrations.
* Incorrect tire pressure: Affects handling and can cause shaking.
* Solution: Inspect tires carefully. Replace damaged tires. Ensure proper inflation pressure (check the sticker on your driver's side doorjamb).
3. Drive Shaft(s):
* Problem: A worn or damaged drive shaft (or CV joints within the drive shaft) can cause vibrations, especially noticeable at higher speeds. This is more likely if the shaking is stronger at higher speeds.
* Solution: Inspect the drive shafts for visible damage, such as cracks, leaks (CV boot damage), or unusual play (movement). A mechanic can check for excessive play using specialized tools. Replacement of the drive shaft or CV joints may be necessary.
4. Wheel Bearings:
* Problem: Worn wheel bearings create rumbling or humming noises and can also cause vibrations, especially noticeable at higher speeds.
* Solution: A mechanic can check for play in the wheel bearings. A noticeable clicking or rumbling sound when turning is often a good indication of worn bearings. Replacement is usually necessary.
5. Brakes:
* Problem: Warped brake rotors or drums can cause pulsating vibrations, particularly when braking. However, it can sometimes present as a shaking sensation even when not braking.
* Solution: Inspect brake rotors and drums for warping or uneven wear. Resurfacing or replacement might be needed.
6. Engine/Transmission Mounts:
* Problem: Worn engine or transmission mounts can allow the engine or transmission to move excessively, causing vibrations to transfer to the chassis.
* Solution: A mechanic can inspect the engine and transmission mounts for damage or excessive movement. Replacement is necessary if they're worn.
7. Steering Components (Less Likely After Control Arm Replacement):
* Problem: While less likely after control arm replacement, problems with tie rod ends, ball joints (if not already replaced during control arm work), or the steering rack can affect steering feel and potentially cause vibrations.
* Solution: A mechanic should check these components if other possibilities are ruled out.
What to Do Next:
1. Start with the simplest and most common: Wheel balancing and alignment. This is the most cost-effective first step.
2. Thorough visual inspection: Carefully examine your tires, drive shafts, and brakes for visible damage.
3. Professional diagnosis: If the problem persists, take your car to a qualified mechanic. They can use diagnostic tools and their expertise to pinpoint the issue. Describing the exact nature of the shaking (constant, pulsating, speed-dependent) will help them diagnose it more accurately.
Don't continue driving with a significant shaking issue, as it can lead to further damage or safety concerns.
