Cost of changing differential fluid8/6/2023 While this is a pretty large price range, that’s because rear differentials vary vastly in size, and you still have to factor in the exact problem of your rear differential. The average cost to repair a rear differential ranges from $500 to $2,000 depending on what you drive and where you take it for repairs. However, skipping these service intervals all but assures that you’re going to need to make expensive repairs at some point. ![]() Keeping up with the regular service intervals greatly reduces the chances that you’ll need to rebuild or replace your rear differential. While this oil can last a long time, it still needs to be serviced every once in a while. Rear differentials utilize a thick oil like 90-weight to keep everything running smoothly. The only thing you can do to minimize your chances of needing rear differential repairs is to keep up with regular service intervals. Minor chattering can turn into a big problem in no time. While you might think that a single broken tooth on a gear isn’t that big of a deal, they typically break 2-4 at a time, and once a few teeth break, it puts more stress on the next ones, and it’s only a matter of time before the next 2-4 teeth break off. This is another serious condition that you need to address right away. The faster you’re driving, the louder the noise will become and the more vibrations you feel. Not only will you hear a chattering sound if this happens, but you’ll also feel vibrations in the steering wheel. While the whirring sound might not be as serious as a banging or clunking sound, that doesn’t mean that you can ignore it.įinally, another sound that you might hear is a “chattering.” This happens with the teeth on the gears of your rear differential break. In fact, it’s the exact same sound – and worn wheel bearings are far more common, which is why people often misdiagnose them. If you do hear a whirring noise, it’s going to remind you of what a worn-out wheel bearing sounds like. Both noises indicate worn-out gears, although a banging or clunking noise is much more severe, and you need to address it immediately. The most common rear differential noise is a whirring sound, although it’s not unheard of to have a clunking or banging sound as you accelerate. If the noise is louder on one side than the other, the noise is likely coming from a faulty wheel bearing, not the rear differential. If you’re having trouble, try shifting sides of the vehicle. ![]() ![]() That’s why when you’re diagnosing a rear differential noise, you should have at least two people in the car to listen from where it is coming. Unfortunately, you can’t lay underneath your vehicle and see where the noise is coming from because you can only hear it when the vehicle is moving! Meanwhile, a rear differential noise is going to come from the differential housing. The easiest way to determine if you are hearing a wheel bearing or differential noise is by slightly turning at higher speeds if the sound changes when the weight distribution of the car changes, you definitely have problems with wheel bearings and not the differential.Ī wheel-bearing noise will come from one of the axles, which means it’s going to sound louder on one side of your vehicle than the other. But starting with the basics, wheel-bearing noises are far more common than rear differential noises – so if you haven’t tracked down the noise yet, there’s a good chance you’ve dodged a bullet and you aren’t actually dealing with a faulty rear differential. Wheel bearing noises and rear differential noises usually sound identical – which is why so many people confuse them. I’ll walk you through everything you need to know to properly diagnose rear differential noises and potentially keep you out of the repair shop. But people often misdiagnose rear differential noises, leading to a panic-inducing headache until the repair shop tells you what’s really going on. ![]() The first sign that there’s something wrong with your rear differential will be something that you hear. What Happens If You Don’t Repair a Damaged Rear Differential? Diagnosing Rear Differential Noises
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