Why is my diff noisy?

If rear differential noise occurs while accelerating the car only at a certain speed, it is likely because the gears have become worn due to overloading and lubrication failure. Generally, worn out pinion bearings can create whirring noises at various speeds, be it may during deceleration and/or acceleration.

How do you quiet a diff noise?

How to Quiet Differential Whine

1. Prep the area.
2. Replace Differential Fluid.
3. Replace the seal.
4. Test the Vehicle.
5. Inspect rear differential gasket, pinion seal, and side seal.
6. Clean the housing.
7. Replace broken parts.
8. Lubricate and re-install axle into differential.

Why are Subaru engines so noisy?

The noise is caused by the timing chain and tensioner.” We reached out to Subaru of America to see if they could (would) explain the unique sound quality of the engines, so many of us know and love. The release of the high-pressure combustion gasses entering the exhaust system causes this noise.

Why is my Subaru Outback making so much noise?

I’ve changed out the front fluid for lucas with 50% lucas additive, no change in the noise. Took the crud off the magnet, the flakes here are incredibly thin and might just be tiny particles held together because they are magnetized, no solid pieces at all.

What kind of diff fluid does Subaru Outback use?

The noise isn’t that bad now, but it is progressing. Front diff fluid has always looked and smelled fine, has even been changed on occasion. There’s no such thing as magic goo in a bottle, but sometimes the right stuff can stretch it out. ’03 Outback H6-3.0 Black Granite Pearl, base model with cold weather package and cloth seats.

Why is 1st gear faster in a Subaru?

In 1st gear, the rate at which the duty cycle responds to factors other than actual wheel speed differences (aka slip) is faster than in the higher gears, but that corresponds to the fact that torque to the wheels in the higher gears isn’t as great as in the lower gears, so the risk of breaking traction in the lower gears is higher.