Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2017 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE
M/T Clutch System: General Description: Specification
| Model | STI | Except for STI | ||
| Transmission type | 6MT | |||
| Clutch cover | Type | Pull type | Push type | |
| Diaphragm set load N (kgf, lbf) | 9120 (930, 2051) | 7450 (760, 1675) | ||
| Clutch disc | Facing material | Woven (non-asbestos) | ||
| O.D. x I.D. x Thickness mm (in) | Clutch cover side | 240 x 160 x 3.5 (9.45 x 6.30 x 0.138) | 230 x 155 x 3.5 (9.06 x 6.10 x 0.138) | |
| Flywheel side | 240 x 160 x 3.2 (9.45 x 6.30 x 0.126) | 230 x 155 x 3.2 (9.06 x 6.10 x 0.126) | ||
| Spline outer diameter mm (in) | 25.2 (0.992), (number of teeth: 24) | |||
| Depth of rivet head mm (in) | Clutch cover side | 1.65 - 2.25 (0.065 - 0.089) | ||
| Flywheel side | 1.35 - 1.95 (0.053 - 0.077) | |||
| Limit of sinking | 0.8 (0.031) | |||
| Deflection limit mm (in) | 0.7 (0.028) at R = 115 (4.53) | 0.7 (0.028) at R = 110 (4.33) | ||
| Clutch release lever ratio | 1.7 | 1.6 | ||
| Release bearing | Grease-packed self-aligning | |||
| Clutch pedal | Full stroke mm (in) | 130 - 135 (5.12 - 5.31) | 135 - 140 (5.31 - 5.51) | |
| Free play mm (in) | 4 - 11 (0.16 - 0.43) | |||
| Flywheel | Type | Conventional | Flexible | |
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.