Car owners share–F18 rear-drive 10W kilometers Replacement of rear axle differential oil–Analysis of old oil situation_Use car, Use car

Car owners share–F18 rear-drive 10W kilometers Replacement of rear axle differential oil–Analysis of old oil situation

WoodrowStrong

August 18, 2024

Catalogue

What is a differential?
Why change the differential oil?
The following is a detailed illustration of the replacement of differential oil.
What is the quality of the poor oil pumped out of 10W km?
Come on!
— finished!
— Summary

Hello, brothers in the forum, Hello, everyone!

Today to hand in the homework, F18 rear drive (open differential) 10W km replacement rear axle differential oil (1L oil) and old oil situation analysis!

As a rear drive, although the 4S store and maintenance manual has never had this maintenance item, or it can be said that life-long do not care, it will not affect the so-called car transport function, after all, the car is very durable!

But I personally think that as long as there is gear rotation, there will be wear between the gears, and it will take a certain period to change the oil! The car can be used and used well, there is still a certain difference! It all depends on your own situation and varies from person to person!

What is a differential?

When the car is turning, we all know that the turning radius of the inner and outer wheels is different, and the turning radius of the outer wheel is larger than that of the inside, so it is easy to cause mechanical damage when the car turns, especially under the sharp turn.

The main function of the differential is to adjust the speed difference of the wheels on both sides, so that the half shaft of the tire can rotate at different speeds, and eliminate the mechanical damage caused by the car turning, so as to improve the tire performance and reduce tire wear!

This role is the most basic role of differential, as for the later development of what central differential, anti-slip differential, LSD differential, Tolson differential and so on, they are designed to improve the driving performance and handling performance of the car!

The differential in modern automobile is usually divided into two categories: open differential and anti-slip differential (LSD) according to its working characteristics.

Why change the differential oil?

Differential oil is a kind of lubricating oil developed for rear wheel differential lubrication, which can effectively protect the differential.
Two aspects of protective effect–

The first is to form an oil film on the meshing surface of the gear to play a role of lubrication, so as to reduce the friction resistance and prolong the life of the parts.
The second is cooling, which takes away the heat generated by the friction pair through flow and plays the role of cooling.

According to their own vehicle type rear drive, four-wheel drive and maintenance manual requirements and use for replacement!

The following is a detailed illustration of the replacement of differential oil.

Lift the vehicle chassis, rear differential oil port, oil discharge and refueling port for the same, not at the bottom, oil discharge needs to be pumped out! It is best to take a hot car for 15 minutes to mix the iron shavings in the oil, because the iron shavings generally sink at the bottom, or pump it a few more times, more thoroughly!

The inner hexagonal bolt, after unscrewing, the old oil came out by itself!

The oil on the nut looks clean! It’s very clear!

It’s pretty clean from the side!

Began to pump oil, the store with air gun transformation tools for extraction, repeatedly extracted 4-5 times, before it is clean!

What is the quality of the poor oil pumped out of 10W km?

The old oil is still quite dirty, the longer it is pumped to the bottom, the more iron filings will become!

If you take a closer look, it’s still pretty dirty, and it’s really time to change the 10W km!

Mixed with some iron shavings! The black oil in the fuel tank is the waste oil before, not the differential oil I put down!

The owner of the repair shop is very serious, smoked 4-5 times, sucked upside down, like such a meticulous technician, although the sparrow is small, the attitude of car repair is really worthy of praise!

After going through the oil forum and inquiring about all kinds of information, I later chose Mott, a fully synthetic lipid gear oil (for open differential), and asked Mott officials to let me fit this type of gear oil. It is said that the original factory is semi-synthetic, or it is better to use fully synthetic lipids, and limited slip differential LSD needs to use LSD special oil. I saw many brands of differential oil at that time. For example, Anso, Red Line, Mott, Mobil, Castrol, etc., only need 1L oil, and later chose this one, which does not mean that my model is the best, just choose what suits you!

Only 1L of oil is needed!

Come on!

I forgot to take a picture when I was refueling. I found this picture on the Internet. I used this machine to put the difference oil in with air pressure. Only 1L of oil is needed.

Just add it to the oil spill!

Spray the oil contaminated areas with parts cleaner to clean them to prevent oil stains and may be corrosive. The owner of the repair shop is really standard in operation!

— finished!

— Summary

After driving 10W kilometers, this is the first time to replace the differential oil, for me, although the official did not ask for replacement, but see the situation of the old oil and iron filings, I will change regularly according to the situation, after all, the price is also very cheap!

My sharing is only for your reference, does not mean that it must be changed, everyone’s concept of owning a car is different, according to their own situation, they can be maintenance-free or can be changed for life!

I am just a car owner, not a businessman, not an advertisement, just share my mind process with everyone in the forum!

Friends who have questions can also leave messages or personal messages. I will answer them all. In addition, there are fun modified car users to join.

Like friends, like, leave a message, thank you, steal time, it is not easy to write a post !

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