Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 189 (BRAKE SYSTEM - GENERAL INFORMATION)DIAGNOSIS AND TESTINGBRAKE SYSTEMSYMPTOM CHART(S)SYMPTOM CHART: NVH
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Symptom Chart: NVH
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Symptom Chart: NVH
WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Diagnostics in this service information assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
| Condition | Possible Sources | Actions |
|---|---|---|
| Vibration when the brakes are applied | Brake disc(s)/ Suspension components |
GO to Pinpoint Test A |
| Brake vibration/shudder -- occurs when the brake pedal is released | Brake drag | REFER to Symptom Chart: Brake System |
| Rattling noise | Caliper guide pins or guide pin bolts Missing or damaged anti-rattle clips or springs Loose brake disc shield |
INSPECT the caliper guide pins and guide pin bolts. INSTALL new components as necessary. INSPECT the brake pads for missing clips or broken springs. INSTALL new components as necessary. TIGHTEN the brake disc shield bolts to specification. REFER to: Brake Disc Shield . |
| Squealing noise -- occurs on first (morning) brake application | Brake pads | Acceptable condition. Caused by humidity and low brake pad temperature. |
| Squealing noise -- a continuous squeal | Brake pads | INSPECT the brake pads. INSTALL new components as necessary. |
| Squealing noise -- an intermittent squeal | Brake pads | Acceptable condition. Caused by cold, heat, water, mud or snow. |
| Groaning noise -- occurs at low speeds with brake lightly applied (creeping) | Brake pads | Acceptable condition. |
| Grinding/moaning noise -- continuous | Brake pads Brake disc |
INSPECT the brake pads, brake discs and attaching hardware for damage. VERIFY brake components are within specifications. INSTALL new components as necessary. |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.