Subaru 2002 Impreza Service Manual page 296

LIMITED SLIP DIFFERENTIAL (LSD)
Differentials
C: OPERATION
1. WHEN RIGHT AND LEFT WHEELS ROTATE AT THE SAME SPEED
During normal straight-ahead driving where the right and left wheels rotate at the same speed,
the differential case and side gears rotate together, just as in conventional differentials. As a result,
driving torque is distributed equally to the right and left side gears.
DI-4
NF0099