Which of the following is NOT a reason for grooving automatic transmission friction discs?

A) assist in cooling
B) act as a wear indicator
C) provide channels to drain fluid
D) retain some fluid to lubricate the discs

Friction Discs

The driven discs in a clutch pack. Most heavy-duty truck chassis use double friction discs. These would be clamped between the clutch pressure plate/intermediate plate/flywheel when the clutch was engaged.

Grooving

The process of cutting narrow slots or grooves on a surface, often for the purpose of installing something or to enhance the surface's properties.

Automatic Transmission

A type of transmission in vehicles that automatically changes gear ratios as the vehicle moves, requiring no driver intervention to change gears manually.