# Tremec T56 Magnum (race use)

- Source: https://racingcarnetwork.com/wiki/tremec-t56-magnum-race/
- Publisher: Racing Car Network (racingcarnetwork.com), the race car marketplace
- Type: part · Brand: Tremec
- Discipline: parts
- Era: 2010s
- Last updated: 2026-07-06

The T56 Magnum is American torque's manual answer: Tremec's six-speed — the OEM-muscle lineage productised for the aftermarket — that V8 road racing, drag builds and pro-touring trust where sequentials cost triple.

## Specifications

| Spec | Value |
|---|---|
| Type | 6-speed manual (race/street) |
| Lineage | OEM T56 → Magnum aftermarket; TKX kin |
| Ratings | LS/Coyote-economy torque tiers |
| Application | Club road race, drag, pro-touring, endurance |
| Position | Dual-purpose tier under sequentials |
| Diligence | Abuse-history audit + identity |
| Years | 2010–present (lineage to 1992) |
| Class | American manual standard |

## History

Tremec's T56 lineage carried American performance's manual era: the six-speed born in OEM muscle (Viper, Camaro, Corvette generations) evolved into the Magnum — the aftermarket-productised version with the stronger internals the tuner world demanded, double-overdrive ratios serving street-strip realities, and torque ratings covering the LS-and-Coyote economy's builds — with the TKX sibling serving four-speed-era swaps and the whole family sold through the American drivetrain trade as catalogue answers to the transmission question V8 builds always reach.

The racing position is honest tiering: where sequentials rule the pure-race tier (Holinger-and-Albins money), the Magnum owns the dual-purpose economy — club road racing's H-pattern classes, drag's manual holdouts, pro-touring and endurance builds prizing synchro civility with race-day strength — the transmission that drives to the track it races.

Used Magnums trade in the American swap economy's volume: torque-abuse history (drag launches age internals invisibly — shift-feel and inspection tell), generation and ratio identity, shifter and bellhousing completeness for the swap arithmetic — with new-crate availability anchoring the used market's honesty.

## Palmarès

Inside club road-racing champions, drag's manual classes and the pro-touring era's flagship builds — the dual-purpose record: American torque managed by synchromesh that survived it.

## What to check before you buy

Abuse history is the audit: drag-launch lives age synchros and dogs invisibly — shift every gear under load where possible, inspect for case damage and fluid evidence, and price unknown-history units as needing inspection teardown. Identity matters (T56 OEM generations versus Magnum aftermarket internals versus TKX — torque ratings and lengths differ), ratio stack against your use, and completeness (shifter, bellhousing, crossmember hardware) carries the swap economy's real money. New-crate pricing caps everything — the used case is condition-verified savings, not treasure hunting. Sequential-versus-Magnum is budget honesty: triple the money buys the racing tier; this tier drives home.

## Did you know

- The Magnum drives to the track it races — the dual-purpose virtue sequential evangelists dismiss until the trailer budget appears.
- OEM-muscle lineage is the strength story: internals proven under Viper torque before the aftermarket asked for more.
- America's H-pattern classes keep the synchro transmission competitive by rulebook — heritage preserved as class structure.

## Related entries

- Chevrolet LS3 crate engine — https://racingcarnetwork.com/wiki/chevrolet-ls3-crate-engine/
- Ford Coyote crate engine — https://racingcarnetwork.com/wiki/ford-coyote-crate-engine/
- Holinger gearbox — https://racingcarnetwork.com/wiki/holinger-gearbox/
- PPG dog box / gearsets — https://racingcarnetwork.com/wiki/ppg-dog-box/