All parts › BMW M4 CSL › Drivetrain › Active M differential › Spider gears
Spider gears
Part of Active M differential · about $340 to replace
What it is
Two spider and two side gears in the carrier.
What it does
Let the rear wheels turn at different speeds in corners.
How it fails
Wear from repeated one-wheel spin.
| Material | Forged steel |
|---|---|
| Spec | 4 gears |