Differential · Transmission
| System | Transmission |
| Subsystem | Differential |
| Assembly | Ring Gear (Differential) |
| Fastener | Bolt |
| Thread | M12x1.25 |
| Grade | 11.9 |
| Years | 1978–1983 |
| Vehicles | 911 Turbo |
| Confidence | Cross Referenced |
Source: Porsche Technical Specifications (WKD 422 720, 911 SC/Turbo 3.3, 78-81 Models), page 67, and WKD 423110 (911 SC/Turbo, 82,83 Models), page 77 - Tightening Torque for Bolts and Nuts of Manual Transmission 930