Porsche 911 Turbo Carrera / 930 Transmission Billet Side Cover (TRA 930 301 311 BSC PMS)

930 Transmission Side Cover 1976-1988 Porsche 911 Turbo Carrera / 930 4 Speed Billet T-6061 Aluminum - Designed - Developed - Tested - And Precision Machined In-House Using Our State-Of-The-Art Haas Mill! The Porsche Ring And Pinion Are Quite Small Given The Performance Capability Of The Vehicles.  This Reduced Ring And Pinion Size -   Use Of Aluminum As The Transmission Case Material - And Rear Engine Layout - Result In Greater Loading Of The Porsche Ring And Pinion. With So Much Weight On The Back Axle The 930 Is Capable Of Generating Huge Amounts Of Traction - This Is Especially True When Equipped With Wider - Taller And Stickier Modern Tires.  This Grip Is Always Looking For A Way To Escape The Driveline System.  Since Wheel Spin Is Not An Option The Torque Looks For Another Way To Escape The Driveline.  This Results In Deflection Of The Ring Gear And Subsequent FlEx In The Transmission Side Cover. In Extreme Cases We Have Seen Cracked Side Covers - Less Severe Cases Result In Worn