Symptom Chart - NVH
WARNING: This page is about a different car, the 2024 Ford Transit-350 HD, 2024 Ford Transit-350, 2024 Ford Transit-250, and 2024 Ford Transit-150. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
NVH symptoms should be identified using the diagnostic tools that are available. For a list of these tools, an explanation of their uses and a glossary of common terms, refer to Article NOISE, VIBRATION AND HARSHNESS
. Since it is possible any one of multiple systems may be the cause of a symptom, it may be necessary to use a process of elimination type of diagnostic approach to pinpoint the responsible system.
REFER to: NOISE, VIBRATION AND HARSHNESS
Symptom Chart - NVH
| Condition | Possible Sources | Actions |
|---|---|---|
| NVH concern isolated to front axle using proper diagnostic tools. Symptom may be constant or only occurs under specific driving conditions | Axle lubricant low or contamination | CHECK the lubricant level. FILL the axle to specification. REFER to: Differential Fluid Level Check . OR INSPECT front axle fluid, if required, Drain and FILL the axle to specification. REFER to: Differential Draining and Filling . |
| Internal FDU (Front Drive Unit) damage | Remove side cover and inspect components for wear or damage. INSTALL a new FDU (Front Drive Unit) as necessary. REFER to: Axle Assembly . | |
| Driveline clunk - loud clunk when shifting from REVERSE to DRIVE | Loose or missing fasteners | CHECK all driveline fasteners for proper torque. |
| Driveline clunk -- occurs as the vehicle starts to move forward following a stop | Loose front axle mount | CHECK the front axle for loose bolts. TIGHTEN to proper torque. REFER to: Axle Assembly . |
| Driveline clunk -- occurs during acceleration or from cruise to coast / deceleration | Rear driveshaft U-joint Missing or damaged circlip on front axle pinion. |
INSPECT the rear driveshaft U-joints for wear or damage. INSTALL a new rear driveshaft as necessary. REFER to: Rear Driveshaft DRIVESHAFT - 10-SPEED AUTOMATIC TRANSMISSION - 10R80 Install new circlip. |
| Grunting -- normally associated with a shudder experienced during acceleration from a complete stop | Rear Driveshaft | INSPECT the rear Driveshaft. INSTALL the new rear Driveshaft. REFER to: Rear Driveshaft DRIVESHAFT - 10-SPEED AUTOMATIC TRANSMISSION - 10R80 |
| Scraping noise -- a continuous low pitched noise starting at low speeds | Front Axle halfshaft seal deflector bent / damaged | INSPECT components for wear/damage. INSTALL a new Halfshaft Seal as necessary. REFER to: Axle Shaft Seal . |
| Driveline shudder - occurs during acceleration from a slow speed or stop | Rear driveshaft | INSPECT the rear Driveshaft. INSTALL the new rear Driveshaft. REFER to: Rear Driveshaft DRIVESHAFT - 10-SPEED AUTOMATIC TRANSMISSION - 10R80 |