Clutch Components for Audi A4 B7

Clutch components are the parts for building or rebuilding a performance clutch, from the assemblies that carry the torque to the tools and small parts the job needs. The section holds twin-disc assemblies, pressure plates in grades of rising clamp load, clutch alignment tools and pilot bushings.

Each part has one job. The pressure plate’s diaphragm spring supplies the clamp load, and the disc or disc pack carries torque by friction. The alignment tool centres the disc while the cover is bolted down, and the pilot bushing supports the tip of the gearbox input shaft in the crankshaft or flywheel. A worn or misaligned part shows up as slip, drag, noise or a gearbox that will not slide home.

The twin-disc assemblies are listed by disc diameter, in inch or metric sizes. Each size comes in grades of rising clamp load and torque capacity, with sprung or rigid discs and a street or race specification.

Choose with these points in mind:

• Size and grade: confirm the part number for your car first, as that fixes the diameter. On the twin-disc assemblies, the digit after the opening T marks the grade, from 1 to 3. Pick the lowest grade that holds your torque with a margin, as each step up adds pedal effort.
• Disc type: sprung discs cushion driveline shock for road use, while rigid discs save weight for competition. Race versions are made for heat and capacity rather than smooth, quiet running.
• Pressure plates: uprated plates add clamp load over a standard cover, and those with an X at the end of the part number add more again.
• Tools and small parts: an alignment tool must match the disc spline and the pilot bore. Renew the pilot bushing with every clutch change, as it can only be reached with the gearbox out.

Inspect the flywheel face for heat spots and cracks before reusing it, and check the release fork, its pivot and the guide tube for wear. Drive a new pilot bushing in square with a suitable drift. Tighten the cover bolts diagonally in stages, then support the gearbox as it goes back in, so its weight never hangs on the disc hub.