It could be the reflection off of metal shavings that have worn off the gears.
Gear oil (80W90 or similar) is used in the transfer case and differentials.
half a quart!
To remove helical gears from a shaft, first ensure the assembly is properly supported and secured. If the gear is fixed with a key, remove the key using a suitable tool. Then, use a gear puller to apply even pressure and gently extract the gear from the shaft. If the gear is stubborn, heating the gear or applying penetrating oil may help ease its removal.
UDI
There is a picture of a gear in the related link. a gear tooth is one of the things on the outside of the gear that sticks out. This gear has 18 teeth.
Usually, this is located in the top of the rear differential. While you're there, check for any sparklies in the gear oil.
It means that more gear oil is put into the gear box in order to have it at the right level.
I mean, is the gear oil synthertic or not?
Ask the question differently! Are you talking about Engine oil or do you really mean Gear oil such as in the rear axle?
I am going to assume this is a truck you're talking about. There may be ground metal in the rear causing the noise and interfering with the differential speed sensor. Drain the gear oil from the real. If the oil contains metal particles (sparklies) or is dark gray to black in color: Replace all bearings in the rear. Replace the spider gears. Visually inspect each tooth of the ring gear and pinion gear for nicks, burrs or chips. If any are present, replace both of those gears, not just the obviously damaged one. Do not forget to use gear marking compound (bright yellow grease) to check for correct gear alignment when you're done. Fill with new gear oil of the correct type.
Yes, you can use 75w-90 gear oil instead of SAE 90 gear oil
Gear oil is normally a much heavier oil.
75w90 gear oil75w90 gear oil
If you are asking about the rear differential, It is - SAE 75W90 synthetic gear oil The front is -SAE 80W90 GL-5 gear oil
80W90 gear oil.
Unit Conversion is an important part of life. In one pound of gear oil, there are sixteen ounces of gear oil.
Dual friction gear oil