AL4 Axle Oil Seal 20026877B for DP0 Left Drive Shaft
The AL4 Axle Oil Seal is a transmission sealing component designed for AL4 and DP0 automatic gearbox repair applications.
This product reference is 20026877B, used for identification of the left drive shaft oil seal installed at the transmission output area.
The oil seal creates a sealing barrier between the rotating axle shaft and the transmission housing, helping prevent automatic transmission fluid leakage during vehicle operation.
The AL4 Axle Oil Seal is suitable for professional automatic transmission workshops, gearbox rebuilders, transmission specialists, automotive parts wholesalers and distributors.
AL4 Axle Oil Seal Product Information
Basic product information:
Reference Number: 20026877B
Transmission: AL4 / DP0
Product Type: Axle Oil Seal
Installation Position: Left Drive Shaft Side
Application: Automatic Transmission Repair
The AL4 Axle Oil Seal should be matched with the original transmission application before installation.
Customers should confirm:
- Original part number
- Left or right installation position
- Seal size
- Transmission model
before ordering.
Function of the AL4 Axle Oil Seal
The main function of the AL4 Axle Oil Seal is to maintain proper sealing between the transmission differential output and the drive shaft.
During vehicle operation, the axle shaft rotates continuously while transmission fluid remains inside the gearbox.
The oil seal helps separate:
- Internal transmission fluid
- Rotating axle shaft
- External environment
Its functions include:
- Preventing ATF leakage
- Maintaining transmission fluid level
- Protecting gearbox components
- Reducing contamination entry
- Supporting stable transmission operation
A damaged seal may result in oil leakage around the axle connection area.
AL4 / DP0 Transmission Application
The AL4 and DP0 automatic transmissions are widely used in Peugeot, Citroen and Renault vehicles.
The transmission contains multiple sealing components, including:
- Axle oil seals
- Internal shaft seals
- Hydraulic seals
- Valve body seals
The AL4 Axle Oil Seal is installed at the differential output side where the drive shaft connects with the gearbox.
Because the seal works with rotating components, correct installation is important for long-term performance.
Left Drive Shaft Oil Seal Replacement
The AL4 Axle Oil Seal is designed for the left drive shaft position.
When replacing axle seals, technicians should confirm:
- Left side or right side application
- Original seal dimensions
- Transmission code
- Vehicle configuration
Using the incorrect side seal may cause installation problems or fluid leakage.
Symptoms of a Damaged Axle Oil Seal
A worn or damaged AL4 Axle Oil Seal may cause:
- Transmission fluid leakage
- Oil marks near the gearbox
- Low ATF level
- Transmission performance problems caused by fluid loss
However, leakage can also come from:
- Other gearbox seals
- Damaged housings
- Loose components
- Incorrect installation
Professional inspection is recommended before replacement.
Why Replace the AL4 Axle Oil Seal
Transmission oil seals operate under continuous heat, pressure and rotation.
Over time, sealing performance may decrease because of:
- Vehicle mileage
- Heat aging
- Shaft wear
- Long-term operation
- Transmission fluid condition
Replacing the AL4 Axle Oil Seal during transmission repair helps restore proper sealing performance.
Professional technicians usually inspect the complete sealing area before installation.
Installation Considerations
The AL4 Axle Oil Seal requires correct installation procedures.
Before installation, technicians should inspect:
- Drive shaft surface
- Transmission housing
- Seal position
- Contact area cleanliness
During installation:
- Avoid damaging the sealing lip
- Install evenly
- Confirm correct depth
- Check for leakage after repair
Incorrect installation can cause leakage even with a new seal.
AL4 Transmission Repair Application
During AL4 / DP0 gearbox repair, axle oil seals are often replaced together with other transmission service components.
Typical repair operations include:
- Transmission overhaul
- Valve body repair
- Solenoid replacement
- Differential inspection
- Fluid replacement
The AL4 Axle Oil Seal is a small but important component that supports reliable gearbox operation.
Difference Between Left and Right Axle Oil Seal
AL4 transmissions use separate axle sealing positions.
The left and right seals may have different:
- Dimensions
- Installation locations
- Reference numbers
Therefore, customers should confirm the correct side before ordering.
This product is the left drive shaft oil seal application.
Professional Installation Recommended
The AL4 Axle Oil Seal should be installed by technicians familiar with automatic transmission repair.
Recommended installation steps:
- Remove old seal carefully
- Clean sealing surface
- Inspect shaft condition
- Install replacement seal
- Check transmission fluid leakage
Professional installation helps reduce repeated gearbox repairs.
Check Compatibility Before Ordering
Before purchasing the AL4 Axle Oil Seal, confirm:
Reference: 20026877B
Transmission: AL4 / DP0
Position: Left Drive Shaft Side
Product Type: Transmission Axle Seal
Please verify:
- Original part number
- Installation side
- Transmission model
- Seal appearance
If compatibility is uncertain, customers can provide original photos for confirmation.
For Automatic Transmission Workshops
The AL4 Axle Oil Seal is suitable for:
- Automatic transmission repair shops
- Peugeot specialists
- Citroen gearbox workshops
- Renault transmission specialists
- Gearbox rebuilders
- Automotive parts distributors
Professional workshops often replace multiple sealing components during complete transmission service.
Related AL4 Transmission Parts
For hydraulic repair:
AL4 Transmission Solenoid Valve 2574-16
For right-side axle sealing:
For complete gearbox maintenance:
Transmission Overhaul Kit
For other sealing requirements:
Oil Seal Products
These products can be combined for AL4 / DP0 transmission repair solutions.
Worldwide Transmission Parts Supply
KS supplies automatic transmission repair components to professional customers worldwide.
Our products include:
- Oil seals
- Solenoid valves
- Valve bodies
- Transmission computers
- Repair kits
- Internal gearbox parts
If you are looking for an AL4 Axle Oil Seal 20026877B, DP0 transmission seals or other automatic gearbox components, contact KS for product information and wholesale quotation.
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