Describe the noise:
* Type of noise: Is it a grinding, clicking, thumping, whirring, squealing, or something else? Be as descriptive as possible.
* Frequency: Is it constant, intermittent, or speed-dependent? Does it change with turning, braking, or accelerating?
* Loudness: Is it a faint noise or a loud, alarming sound?
* Conditions: Does it occur on all road surfaces, or only on rough roads? Does it happen only when turning, braking, accelerating, or coasting?
Possible causes based on common rear-end issues:
* Worn-out wheel bearings: This often presents as a growling or humming noise that increases with speed.
* Bad rear shocks or struts: These can cause thumping or clunking sounds, especially on bumps.
* Worn-out suspension components: Bushings, control arm ball joints, or other suspension parts can cause various knocking or clicking sounds.
* Brake issues: Worn brake pads or rotors can squeal or grind, especially when braking. A dragging caliper can cause a groaning or grinding sound, even without braking.
* Differential problems: A noisy differential might make a whining, humming, or groaning sound, often dependent on speed and load. This is more serious and requires professional attention. Low differential fluid is a common cause of this.
* Exhaust system: A loose or damaged exhaust system can rattle or make other noises.
* Loose components: Something might simply be loose in the trunk or under the car, rattling against other parts.
Troubleshooting steps:
1. Visual inspection: Carefully look underneath the rear of the car for anything obviously loose or damaged. Check the exhaust system, suspension components, and brake components. Note any obvious wear or damage.
2. Test drive: Pay close attention to when the noise occurs. Try driving on different road surfaces and at various speeds. Try turning the steering wheel sharply (while maintaining safe driving practices).
3. Jack up the car (safely!) and check for play: With the car safely jacked up and secured on jack stands, check for excessive play in the wheels (wheel bearings), suspension components, and the driveshaft (if you can safely assess this).
Recommendation:
If you can't pinpoint the problem yourself, it's best to take your 1996 Ford Taurus to a qualified mechanic for diagnosis and repair. Ignoring a rear-end noise could lead to more serious (and expensive) problems down the road, including potential loss of control of the vehicle. The age of the car makes preventative maintenance a good idea as well.
