Tremec T56 Countershaft Rear Tapered Bearing & Race.  #C17-1 & #C17-2 on the T56 Transmission Disassembled View  

Tremec T56 Countershaft Tapered Front Bearing & Race.  C19-1 & C19-2 on the T56 Transmission Disassembled View  

Tremec 6 Speed Transmission Extension Housing Bolt (M10 x 1.5). Sold individually. #A46 on the T56 Transmission Disassembled View  

Tremec T56 Shifter Assembly Bolt, set of 4. M8 x 1.25.  #D34 on the T56 Transmission Disassembled View  

Tremec T56 Isolator Cup (also known as Shifter Cup Bushing or Spring Cup Isolator).  #D31 on the T56 Transmission Disassembled View  

Tremec 6 Speed Reverse Lockout Assembly Bolt.  #E4 on the T56 Transmission Disassembled View  

Complete Tremec Reverse Lockout Assembly.  Includes E3-1, E3-2 and E3-3 on the T56 Transmission Disassembled View  

Tremec T56 Electronic Speed Sensor, 2004-06 GTO, 2004-07 CTS-V.  #E7 on the T56 Transmission Disassembled View  

Tremec T56 Transmission Extension Housing, 96-2002 F-Body, 2004-06 GTO #A44 (better known as a tailhousing) for 96-02 F-Body & 04-06 GTO.  Includes output shaft/slip yoke bushing.  #A44...

Tremec T56 Speedometer Rotor Gear for 93-02 F-Body and 04-06 GTO.  #81 on the T56 Transmission Disassembled View, seen here, here and here.

Tremec T56 Extension Bearing Washer / Spacer for Rear Mainshaft Bearing, Nylon (replaces steel spacer), requires 2.  #A5 on the T56 Transmission Disassembled View  

Tremec T56 Rear Mainshaft Extension Bearing Assembly Includes Mainshaft Roller Bearing & Outer Race.  #A4-1 & #A4-2 on the T56 Transmission Disassembled View