Tremec T56 Input Shaft for 1998-02 (LS1) Camaro & Firebird T56 Transmissions.  26 spline, 31 tooth, 2.66 Low Gear  B2-1 on the T56 Transmission Disassembled View

Tremec Viper 30 Spline Output T56 Mainshaft (F-Body Upgrade)  #A43 on the T56 Transmission Disassembled View 30 spline output, commonly

Tremec T56 5th/6th Gear Countershaft Extension, 94-02 Camaro / Firebird. #C4 on the T56 Transmission Disassembled View. Fits: Camaro / Firebird T56 1993 - 2002 Viper T56 1992 - up with 2 piece...

Aftermarket T56 Main Shaft for 93-02 LT1 & LS1 F-Body T56 Transmissions.  #A43 on the T56 Transmission Disassembled View.  

Tremec LS1 T56 Input Shaft F-Body Camaro/Firebird New Aftermarket, 26 spline, 31 tooth, 2.66 Low Gear  B2-1 on the T56 Transmission Disassembled View

Outside diameter of slip yoke barrel is 1.680 inches   Length to center of u-joint... Dimension #1 = 6 5/8 inches Barrel Diameter... Dimension #2 = 1.680 inches Barrel Length... Dimension #3 = 4...