1. Thoroughly Inspect the New Rotors
* Warping: Even new rotors can warp during installation or due to uneven braking. Look for any visible bending or unevenness on the rotor surface.
* Runout: Use a dial indicator to measure runout (the deviation from a perfectly flat surface). Ideally, runout should be less than 0.003 inches.
* Thickness: Ensure the rotors are within the manufacturer's recommended minimum thickness. You can find this in your repair manual or online.
2. Examine Other Brake Components:
* Calipers: Check for sticking pistons, seized slides, or other issues that might be preventing even pressure.
* Pads: Make sure the new brake pads are seated properly and are the correct thickness.
* Wheel Bearings: Worn wheel bearings can contribute to shaking. Check for any play or noise.
* Lug Nuts: Ensure they are properly torqued to the manufacturer's specification.
3. Wheel Alignment and Suspension:
* Alignment: Improper alignment can cause uneven tire wear and contribute to shaking.
* Suspension: Inspect for worn or damaged suspension components like ball joints, tie rod ends, control arm bushings, and struts or shocks.
4. Other Potential Causes:
* Tires: Uneven tire wear, tire pressure differences, or damaged tires can also cause shaking.
* Driveshaft: Check for worn U-joints or other issues in the driveshaft.
* Engine/Transmission: Less likely, but a problem in the engine or transmission could cause shaking.
How to Proceed:
1. Start with the basics: Carefully inspect the rotors, brake pads, and calipers.
2. If you find any issues: Address them before moving on.
3. If all brake components seem fine: Check the alignment, suspension, tires, and driveshaft.
Professional Help:
If you're not comfortable tackling these checks yourself, it's best to take your Ford E150 to a reputable mechanic. They have the tools and experience to diagnose and fix the problem accurately.
Additional Tips:
* Use high-quality parts: When replacing components, use reputable brands.
* Get a proper brake job: Many shops offer a comprehensive brake service that includes all necessary checks and adjustments.
Let me know if you have any other questions.
