The T-56 six speed manual transmission has been used in a wide range of vehicles from General Motors, Dodge, and Ford Motor Company. The transmission was originally designed and built by Borg-Warner for the Dodge Viper later being used by GM in 1992 for the generation II and later engines, but as of 1998, is built by Tremec, though nothing changed internally. The T-56 has been succeeded by the Tremec TR-6060 transmission in many former T-56 applications, as well as applications requiring greater strength than the T-56 could offer.
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The transmission uses a hydraulic clutch, except for the Cobra which is mechanical and had an 11 inch clutch disk. The entire case, including the bell housing, is made of aluminum. The T-56 has a synchromesh made up of brass synchros for the GM and Ford applications, and stainless steel in the Dodge application. The transmission also features internal stops which render stopbolts on the shifter mechanism unnecessary.
| Tag ID | Application | Torque Rating | 1st | 2nd | 3rd | 4th | 5th | 6th | Rev | Input Splines | Output Splines |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1386-000-003 | 1992 Dodge Viper | 330 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 30 |
| 1386-000-005 | 1993-1995 Dodge Viper | 550 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 30 |
| 1386-000-006 | 1993 Camaro/Firebird w/2.73 final drive "M28" | 350 | 3.36:1 | 2.07:1 | 1.35:1 | 1.00:1 | 0.80:1 | 0.62:1 | 3.28:1 | 26 | 27 |
| 1386-000-007 | 1993 Camaro/Firebird w/3.23 final drive "M29" | 350 | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.80:1 | 0.62:1 | 3.28:1 | 26 | 27 |
| 1386-000-009 | 1994-1995 Camaro/Firebird | 450 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 27 |
| 1386-000-011 | GM Aftermarket | 450 | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.80:1 | 0.62:1 | 3.28:1 | 26 | 27 |
| 1386-000-012 | Mustang 5.0 Aftermarket | 450 | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.80:1 | 0.62:1 | 3.28:1 | 10 | 31 |
| 1386-000-013 | Holden | 450 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 27 |
| 1386-000-014 | 1996-2002 Dodge Viper | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 30 | |
| 1386-000-016 | 1996-1997 Camaro/Firebird | 450 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 27 |
| 1386-000-017 | 1998 Camaro/Firebird | 450 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 27 |
| 1386-000-018 | 1996-2002 Dodge Viper | 450 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 30 |
| 1386-000-019 | 390 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | |||
| 1386-000-020 | 1999-2002 Camaro/Firebird | 450 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 27 |
| 1386-000-021 | Aston Martin | 450 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.79:1 | 0.63:1 | 2.90:1 | 26 | 30 |
| 1386-000-022 | Holden Commodore | 350 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 27 |
| 1386-000-023 | Corvette C5 | 375 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 27 |
| 1386-000-024 | 375 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | |||
| 1386-000-025 | Corvette Z06 C5 | 385 | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.84:1 | 0.56:1 | 2.90:1 | 26 | 27 |
| TNET-1077 | 415 | 2.97:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | |||
| TNET-1247 | Dodge Viper | 450 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 30 |
| TUET-1259 | 4.6 Mustang Aftermarket w/mech speedo | 450 | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.80:1 | 0.62:1 | 3.28:1 | 10 | 31 |
| TUET-1260 | 4.6 Mustang Aftermarket w/elec speedo | 450 | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.80:1 | 0.62:1 | 3.28:1 | 10 | 31 |
| TUET-1452 | Chevrolet Corvette | 370 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 27 |
| TUET-1453 | Chevrolet Corvette | 370 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 27 |
| TUET-1576 | 415 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.79:1 | 0.63:1 | 2.90:1 | |||
| TUET-1660 | 350 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 27 | ||
| TUET-1694 | 2003-2004 Mustang Cobra | 450 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.79:1 | 0.63:1 | 2.90:1 | 10 | 27 |
| TUET-1806 | Dodge Viper SRT-10 | 550 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 30 |
| TUET-2022 | Cadillac CTS-V | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.84:1 | 0.56:1 | 2.90:1 | |||
| TUET-2060 | Mustang Cobra | 450 | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.80:1 | 0.62:1 | 3.28:1 | 10 | 31 |
| TUET-2062 | Dodge Viper | 550 | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.74:1 | 0.50:1 | 2.90:1 | 26 | 30 |
| TUET-2066 | Pontiac GTO/Holden Monaro | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.84:1 | 0.56:1 | 2.90:1 | 26 | 27 | |
| TUET-5044 | Cadillac CTS-V | 2.97:1 | 2.07:1 | 1.43:1 | 1.00:1 | 0.84:1 | 0.56:1 | 2.90:1 | |||
| TUET-6450 | T-56 Ford N/A XR6 | 3.35:1 | 2.07:1 | 1.35:1 | 1.00:1 | 0.80:1 | 0.63:1 | 23 | 31 | ||
| TUET-7477 | T-56 Magnum Chevy Aftermarket | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.80:1 | 0.63:1 | 26 | 27 | ||
| TUET-7484 | T-56 Magnum Ford Aftermarket | 2.66:1 | 1.78:1 | 1.30:1 | 1.00:1 | 0.80:1 | 0.63:1 | 10 | 31 | ||
| TUET-8274 | T-56 Magnum Ford Aftermarket | 2.97:1 | 2.10:1 | 1.46:1 | 1.00:1 | 0.74:1 | 0.50:1 | 10 | 31 | ||
| TUET-8277 | T-56 Magnum Chevy Aftermarket | 2.97:1 | 2.10:1 | 1.46:1 | 1.00:1 | 0.74:1 | 0.50:1 | 26 | 27 |