Friction discs, automatic transmission 4F27E

Friction discs are the main components in 4F27E automatic transmissions and are used to transmit torque between different planetary gears.

Characteristics of friction discs 4F27E:

* Material: Typically made from special friction paper with a synthetic binder.
* Shape: Ring-shaped with inner and outer diameters.
* Thickness: Varies depending on disc type.
* Quantity: The 4F27E automatic transmission uses 11 friction discs.

Types of friction discs 4F27E:

There are two main types of friction discs in the 4F27E automatic transmission:

*Single-acting discs: Used to transmit torque in one direction (for example, from the input shaft to the planetary gear).
*Double-acting discs: Used to transmit torque in two directions (for example, from a planetary gear to a drive shaft).

Functions of friction discs:

* Transmit torque between rotating elements.
* Provides smooth gear shifting.
* Dampen vibrations and reduce noise.

Replacing friction discs:

Friction discs usually last from 100,000 to 150,000 km. However, they can fail sooner under extreme loads or lack of proper maintenance.

Symptoms indicating the need to replace friction discs:

* Gear slippage
* Gear shift delay
* Jerks and shocks when switching
* Transmission fluid leaks

To replace the friction discs, you need to remove the gearbox and disassemble it. This is a complex procedure and should only be performed by a qualified mechanic.

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