: Smooth metal separator plates that sit between the friction discs.

A Closer Look at the Components of an Automatic Transmission

Professional mechanics often use comprehensive (sometimes colloquially referred to as "tranny packs" or kits) to restore performance when these internal parts wear out. These kits typically include new friction plates, steel plates, gaskets, and seals to ensure the transmission remains leak-free and shifts smoothly. Key Functions and Components

: Discs coated with high-grip material that grab onto the steel plates when hydraulic pressure is applied.

: Oil pressure from the transmission's pump is the force that physically "packs" these plates together to transfer power.

: Excessive heat is the primary enemy of these components, causing the friction material to glaze or burn, leading to "slipping" gears.