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.
| Condition | Possible Sources | Actions |
|---|---|---|
| Axle howling or whine | Axle lubricant low | CHECK the lubricant level. FILL the axle to specification. REFER to: Differential Fluid Level Check |
| Axle housing damage | INSPECT and INSTALL a new axle assembly as necessary. REFER to: Axle Assembly | |
| Damaged, worn or incorrect ring and pinion gear contact | INSPECT and INSTALL a new ring and pinion set as necessary. Refer to, Contact Pattern of this procedure, or REFER to: Drive Pinion | |
| Driveline clunk - loud clunk when shifting from REVERSE to DRIVE | Incorrect axle lubricant level | CHECK the lubricant level. FILL the axle to specification. REFER to: Differential Fluid Level Check |
| Excessive backlash in the axle | CHECK for excessive axle backlash. ADJUST backlash as necessary. REFER to: Ring Gear Backlash Adjustment | |
| Driveline clunk -- occurs as the vehicle starts to move forward following a stop | Pinion gears | CHECK and REPLACE as necessary REFER to: Drive Pinion Front Bearing |
| Grinding, popping or chattering - noise from the rear axle when the vehicle is turning | Damaged or worn differential (differential side gears and pinion gears) | INSPECT the differential carrier and the components of the differential carrier. INSTALL a new differential carrier and/or differential carrier components as necessary. REFER to: Differential Carrier |
| High pitched chattering -- noise from the axle when the vehicle is turning | Incorrect or contaminated lubricant | CHECK the vehicle by driving in tight circles (5 clockwise, 5 counterclockwise). CLEAN and REFILL the axle to specification. NOTICE: DO NOT add more friction modifier than is specified. REFER to: Axle and Differential Draining and Filling |
| Damaged or worn differential (differential side gears and pinion gears) | REPAIR or INSTALL new differential side gears or pinion gears as necessary. REFER to: Differential Carrier | |
| Grunting -- normally associated with a shudder experienced during acceleration from a complete stop | Loose rear axle mount bolts or suspension fasteners | CHECK for loose bolts. TIGHTEN to specifications. REFER to: Axle Assembly |
| Howl - can occur at various speeds and driving conditions. Affected by acceleration and deceleration | Incorrect ring and pinion contact, incorrect bearing preload or gear damage | INSPECT and ADJUST as necessary. Refer to, Contact Pattern of this procedure, or REFER to: Differential Carrier REFER to: Ring Gear Backlash Adjustment |
| Chuckle - heard at coast/ deceleration. Also described as knock | Incorrect ring and pinion contact or damaged teeth on the coast side of the ring and pinion | INSPECT and INSTALL a new ring and pinion set as necessary. Refer to, Contact Pattern of this procedure, or REFER to: Drive Pinion |
| Knock - noise occurs at various speeds. Not affected by acceleration or deceleration | Gear tooth damage to the driver side of the ring and pinion | INSPECT and INSTALL a new ring and pinion as necessary. REFER to: Drive Pinion REFER to: Differential Carrier |
| Scraping noise - a continuous low pitched noise starting at low speed | Worn or damaged pinion bearings | INSPECT and INSTALL new pinion bearings as necessary. REFER to: Drive Pinion Front Bearing |
| Driveline shudder - occurs during acceleration from a slow speed or stop | Rear drive axle assembly mispositioned | CHECK the axle mounts and the rear suspension for damage or wear. Repair as necessary. REFER to: Axle Assembly |
| Loose rear axle bolts | CHECK the rear axle for loose bolts. TIGHTEN the bolts as necessary. REFER to: Axle Assembly | |
| Driveline angles out of specification | CHECK for correct driveline angles. REFER to: DRIVESHAFT - 10-SPEED AUTOMATIC TRANSMISSION - 10R80 . |