TREMEC T56 Magnum 6-Speed Manual Transmission
Built for serious performance applications, the TREMEC T56 Magnum 6-Speed Manual Transmission is an aftermarket high-torque gearbox designed for high-horsepower street cars, track builds, and restomods. With a 700 lb-ft torque capacity and 7,500+ RPM shift capability, the Magnum combines heavy-duty internals with six-speed double-overdrive gearing for strong acceleration and relaxed highway cruising.
Why Choose the T56 Magnum?
The T56 Magnum transmission was developed from TREMEC’s modern high-performance manual transmission architecture and incorporates features designed specifically for aftermarket performance and swap applications. Unlike a traditional OEM T-56, the Magnum offers multiple shifter positions and dual speedometer pickups, giving builders greater flexibility when adapting the transmission to different chassis.
Its combination of high torque capacity, six-speed gearing, and flexible installation options makes it a popular choice for LS, LT, Coyote, and classic muscle car projects.
700 lb-ft Performance Capacity
The T56 Magnum 6-speed is rated for up to 700 lb-ft of torque, giving high-output builds substantially more drivetrain capacity than many factory manual transmissions. TREMEC also lists a 7,500+ RPM shift capability for the Magnum, making it well suited to engines designed to operate at higher RPM.
This combination makes the transmission particularly attractive for naturally aspirated and forced-induction performance builds where drivetrain strength is a priority.
Heavy-Duty Internal Design
The TREMEC T56 Magnum features a 26-spline input shaft, 31-spline output shaft, and multi-cone synchronizers designed to provide smooth, precise gear engagement under demanding conditions.
The transmission also uses double-overdrive gearing, allowing builders to combine aggressive performance gearing with lower engine RPM during highway cruising.
Flexible Swap Configuration
One of the major advantages of a T56 Magnum transmission is its adaptability to custom builds. Multiple shifter locations and dual speedometer provisions allow the gearbox to be configured for a wide range of chassis and drivetrain layouts.
The Magnum is commonly used in:
- GM LS and LT swaps
- Ford Modular and Coyote builds
- Classic muscle cars
- Restomods
- Pro-touring vehicles
- High-performance street cars
- Track and road-race projects
Exact fitment depends on the specific transmission version, bellhousing, clutch, shifter configuration, engine, and chassis. Verify compatibility before installation.
Inspected & Bench-Tested
This T56 Magnum transmission undergoes thorough inspection and bench testing before shipping. The process is designed to verify proper gear engagement and overall mechanical condition.
Inspection includes:
- Gear engagement checks
- Synchronizer operation
- Reverse engagement verification
- General mechanical inspection
- Bench testing
- Cleaning and preparation
This additional testing gives buyers greater confidence when purchasing a performance manual transmission for a high-value build.
T56 Magnum Specifications
| Specification | Details |
|---|---|
| Transmission | TREMEC T56 Magnum |
| Type | 6-Speed Manual |
| Torque Capacity | Up to 700 lb-ft |
| Shift Capability | 7,500+ RPM |
| Input Shaft | 26-Spline |
| Output Shaft | 31-Spline |
| Overdrive | Double Overdrive |
| Shifter Positions | Multiple |
| Speedometer Provision | Dual Pickups |
| Applications | LS/LT, Coyote, Restomod & Performance Builds |
| Warranty | 1-Year Replacement Warranty |
Built for High-Horsepower Swaps
The T56 Magnum 6-speed transmission is especially well suited to builders who need more strength than a typical factory manual gearbox while retaining the drivability benefits of six-speed overdrive gearing.
For an LS or Coyote swap, the transmission should be matched to the appropriate bellhousing, clutch system, input configuration, driveshaft, crossmember, and shifter position. Installation requirements can vary significantly between chassis.
Backed by a 1-Year Replacement Warranty
This TREMEC T56 Magnum is inspected and bench-tested before shipping and backed by a 1-year replacement warranty. That combination of testing and warranty coverage provides additional confidence when selecting a high-performance manual transmission for a demanding project.
Shop the T56 Magnum Transmission
If you’re looking for a T56 Magnum transmission capable of handling up to 700 lb-ft of torque, this six-speed manual combines high-RPM shifting capability, double-overdrive gearing, heavy-duty shafts, and flexible shifter configurations. It’s a strong choice for LS/LT swaps, Coyote builds, restomods, muscle cars, and high-performance street or track projects.
