[Free Car] Audi A4L B8 0AW gearbox floor oil started to decline
JeremyReynolds 
9 Model: Audi A4L 2.0T B8
Mileage: 151000 km
Failure phenomenon: when the D-gear floor oil starts, the vehicle can only increase speed after a setback or two, which is the same as sound. Everything is fine when you step on the gas pedal.
Replacement item: transmission input shaft clutch friction disc
Accessories brand: BergWarner
With replacement accessories: reverse clutch friction disc, built-in gearbox oil filter assembly, input shaft oil seal, computer version end plug oil seal, input shaft clutch pressure piston, 8 liter gearbox oil.
Mileage: 151000 km
Failure phenomenon: when the D-gear floor oil starts, the vehicle can only increase speed after a setback or two, which is the same as sound. Everything is fine when you step on the gas pedal.
Replacement item: transmission input shaft clutch friction disc
Accessories brand: BergWarner
With replacement accessories: reverse clutch friction disc, built-in gearbox oil filter assembly, input shaft oil seal, computer version end plug oil seal, input shaft clutch pressure piston, 8 liter gearbox oil.
This fault phenomenon has already begun to reflect at 140000 km, during which I used a special inspection computer to match the clutch gap, the problem has not been improved, and the gearbox has no reason to break the code. At this time, it has been determined that the friction disc of the input shaft clutch is worn, resulting in a large gap. A few days of National Day this year, I took the time to consult with the professional gearbox maintenance office, during which I consulted 2 maintenance points. They also concluded that the friction disc of the input shaft clutch needs to be replaced, which is also a BergWarner accessory, but there is a big difference in price, and then they choose the agreed time for maintenance at a relatively low price. After maintenance, the warranty is one year, unlimited mileage.
At 9: 00 in the morning, I came to the maintenance point and waited for the gearbox assembly to be removed on the shelf.
The price list of the maintenance project has been signed and ready to be put on the shelf and disassembled.
The gearbox assembly has come down, pull it over and decompose it
The engine flywheel behind the gearbox.
It can be seen that there is oil leakage in the gearbox computer board plug.
It took three people to disassemble the gearbox assembly and it took 1.5 hours.
The next step is to disassemble the gearbox and check the parts that need to be replaced
The next step is to disassemble the gearbox and check the parts that need to be replaced
Special tool pulls out the gearbox input shaft assembly.
One master, three apprentices, began to decompose the back cover.
This is 0AW’s computer board.
The middle case has been taken down, the pressure cylinder has been taken out, and the black facade of the middle shell is the built-in filter element, which cannot be replaced without disassembling the gearbox.
The whole picture after disassembly.
This is the pressure piston of the input shaft that needs to be replaced. The small gap in the hand is a little bit. Replace it. The price is 300 yuan. The black one on the right is the computer board oil seal.
This is the clutch friction disc and steel plate of the input shaft. A total of 7 friction plates, varying degrees of wear, after measurement, the gap has exceeded the standard value. This is the root cause of floor oil’s initial setback.
Zoom in and look at the details, the wear is more obvious, and it has been blackened at high temperature.
On the left is the input shaft clutch friction plate, on the right is the reverse friction plate, the reverse gear is also 7 pieces.
The decomposed pressure cylinder, the CVT chain is sheathed on these two cones, relying on oil pressure to achieve variable speed.
This is the metal greasy absorbed by the magnet on the back of the built-in filter element.
This is the oil inlet under the built-in filter element, there is a filter screen, there are already a lot of impurities above.
After it’s all broken up, all the accessories are here.
Look at the details of the pressure cylinder, there is basically no wear and tear.
Details of the pressure cylinder
Steel chain CVT, sturdy. Don’t compare Nissan’s chain.
The above are all broken down gearboxes, check for faulty parts, and then the head office will deliver the goods uniformly and replace them all.
When the time came to 9: 00 the next morning, the accessories distributed by the main store were already in place and began to be assembled.
The above are the parts that need to be replaced, which have been explained at the beginning of the post.
New reverse friction plate
New input shaft friction plate
Small piston
These are two sets of old friction plates.
Start assembling the pressure cylinder
Put on the middle shell, computer board, ready to install the back cover.
After the assembly is completed, turn over and install the input shaft.
Release differential oil and add new differential oil
The differential oil has been changed by the way and is ready to be loaded. Add the gearbox oil after you get on the car.
It’s already 2: 00 p. M. when it’s all assembled, and it takes 2 hours to start loading.
All of them are on board, and the accessories are being assembled.
8 liter gearbox oil filling
Already drove around in the field, came back to check if there was a fault code, and then drove out to wait for the oil temperature to match the clutch.
At this point, all completed, the test floor without a setback, the most exciting moment is payment.
As a result of professional maintenance, disassembly to assembly installation, screws are classified storage, and finally all completed, all screws, clips, not a missing installation.
Then look at the use within a year, if I chose a home only 300m away from a repair, replace these accessories, the price is about 6000 yuan. Taking all things into consideration, it is still chosen in the far east of Ningbo, 20 kilometers away from home, all down 3800 yuan, which is also within the scope of bearing.
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