Clutch Pack

The stacks of friction and steel plates that lock elements of the gear train together to give each ratio. Applied hydraulically, so they depend on pressure being both sufficient and correctly timed — which is why worn clutches and a pressure fault produce the same slipping and the same gear ratio codes, and why fluid and pressure should be checked before an internal diagnosis is accepted. When they do wear, the friction material ends up in the fluid and eventually on every magnetic sensor in the gearbox, so their condition is often readable from the sump long before it is provable any other way.

Also known as: clutch packs, friction plates, transmission clutches, clutch plates, brake band

Referenced by 122 codes

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Codes involving this component (122)

Other components in Transmission

Information, not instruction

CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.

Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.

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