How do I know if I have a bad pinion bearing?
Then, what happens if a pinion bearing breaks?
Only real problem is the pinion shaft retaining "bolt", if it's broken, you can't easily get the carrier out. Still, even if it was broken, it would take you all of 5 minutes to figure that out, and put it back together.
Secondly, what does a bad wheel bearing sound like? The most common symptom with a bad wheel bearing is a loud noise coming from the tire or wheel of the vehicle. It will sound like metal grinding on metal and will get louder as the vehicle goes faster. A bad wheel bearing can lead to uneven tire wear, which means you will have to purchase tires sooner.
In this manner, how long do pinion bearings last?
Under normal use and maintenance, pinion bearings can last a very long time. My 84 Suburban, which spent most of its life towing, just had a rear pinion bearing go bad at 187K miles.
How do you know if you have a bad differential?
Whining Differential or Transmission One of the symptoms most commonly associated with bad or failing differential or gear oil is a noisy transmission or differential. If the gear oil runs low or becomes excessively dirty, it can cause the gears to whine or howl as they turn.