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 185 (NOISE, VIBRATION AND HARSHNESS)
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Section 185 (Noise, Vibration And Harshness)
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Section 185 (Noise, Vibration And Harshness)
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.
- Description And Operation
- Noise, Vibration and Harshness (NVH)
- Acceptable Noise, Vibration and Harshness (NVH)
- Glossary of Terms
- Amplitude:
- Boom:
- Buffet/Buffeting:
- Buzz:
- Chatter:
- Chirp:
- Chuckle:
- Click:
- Clonk:
- Clunk/Driveline Clunk:
- Conductor:
- Cycles Per Second:
- Cracks:
- Creak:
- Cycle:
- Decibel (dB):
- Drone:
- Drumming:
- Flutter:
- Frequency:
- G-force:
- Gravelly Feel:
- Grind:
- Hz (Hertz):
- Hiss:
- Hoot:
- Howl:
- Hum:
- Intensity:
- Knock:
- Moan:
- Ping:
- Pitch:
- Pumping Feel:
- Rattle:
- Reactor:
- Roughness:
- Rustling:
- Shake:
- Shimmy:
- Shudder:
- Slap:
- Squeak:
- Squeal:
- Tap:
- Thump:
- Tick:
- Tip-In-Moan:
- Transient:
- Vibration:
- Whine:
- Whistle:
- Wind Noise:
- Noise, Vibration and Harshness (NVH)
- Diagnosis And Testing
- Noise, Vibration and Harshness (NVH)
- Notes
- Diagnostic Theory
- Diagnostic Procedure Overview
- Tools and Techniques
- Diagnostic Guide
- 1: Customer Interview
- 2: Pre-Drive Check
- 3: Preparing for the Road Test
- 4: Verify the Customer Concern
- 5: Road Test
- Symptom Charts
- Noise, Vibration and Harshness (NVH) Symptoms
- Noise Symptoms
- Vibration Symptoms
- Order of Vibration
- Relationship of Vibration Frequency to Order of Vibration
- Frequency Calculations
- Harshness Symptoms
- Noise, Vibration and Harshness (NVH) Symptom Chart Categories
- Symptom Chart: Vehicle-Speed Related Vibrations
- Symptom Chart-Tire-Speed Related Vibrations
- Symptom Chart-Driveshaft-Speed Related Vibrations
- Symptom Chart: Powertrain-Speed Related Vibrations
- Symptom Chart: Engine-Speed Related Vibrations
- Symptom Chart: Noise, Air Leaks or Water Leaks
- Symptom Chart: Harshness
- Noise, Vibration and Harshness (NVH)
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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.