TR6060 gear ratios vary significantly depending on the transmission configuration and vehicle application. Although the TREMEC TR-6060 is a six-speed manual transmission, there is no single ratio set that applies to every TR6060. TREMEC’s published specifications list multiple A through F configurations, with first through sixth gears, reverse ratios, and input-torque specifications changing between versions.
Understanding these differences is important when comparing a TR6060 transmission, identifying a replacement, planning a swap, or choosing gearing for a performance build.
TREMEC TR6060 Gear Ratios at a Glance
TREMEC’s technical documentation lists six primary TR-6060 ratio configurations. The biggest differences occur in first, second, fifth, and sixth gears, while fourth gear is 1.00:1 across all six configurations.
| Gear | A | B | C | D | E | F |
|---|---|---|---|---|---|---|
| 1st | 3.01 | 2.98 | 2.66 | 2.66 | 2.29 | 2.26 |
| 2nd | 2.07 | 1.78 | 1.78 | 1.82 | 1.61 | 1.58 |
| 3rd | 1.43 | 1.30 | 1.30 | 1.30 | 1.21 | 1.19 |
| 4th | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| 5th | 0.84 | 0.74 | 0.80 | 0.76 | 0.82 | 0.71 |
| 6th | 0.57 | 0.50 | 0.63 | 0.50 | 0.68 | 0.50 |
| Reverse | 3.28 | 2.90 | 2.90 | 2.90 | 3.11 | 2.90 |
| TREMEC listed input torque | 430 lb-ft | 500 lb-ft | 560 lb-ft | 600 lb-ft | 650 lb-ft | 650 lb-ft |
TREMEC notes that alternative ratios can be available and that changing ratios may affect the maximum input-torque specification.
What Do the TR6060 Gear Ratios Mean?
A transmission gear ratio describes the relationship between the transmission input and output speeds.
A higher numerical ratio provides more mechanical multiplication in that gear. A lower numerical ratio reduces the multiplication and allows the vehicle to travel faster at a given engine speed.
For example, a 3.01:1 first gear provides a different launch characteristic than a 2.26:1 first gear. Likewise, a 0.50:1 sixth gear provides substantially more engine-speed reduction in top gear than a 0.68:1 sixth gear.
That is why simply saying a vehicle has a “TR6060” does not tell you exactly how it will behave on the road.
TR6060 Configuration A
Configuration A uses a relatively short 3.01:1 first gear and a 0.57:1 sixth gear.
| Gear | Ratio |
|---|---|
| 1st | 3.01 |
| 2nd | 2.07 |
| 3rd | 1.43 |
| 4th | 1.00 |
| 5th | 0.84 |
| 6th | 0.57 |
| Reverse | 3.28 |
TREMEC lists Configuration A at 430 lb-ft of input torque in its general TR-6060 specification.
This ratio arrangement is also associated with applications using the 3.01/2.07/1.43/1.00/0.84/0.57 combination. Application-specific references list this pattern in vehicles including the Chevrolet Camaro SS and certain Holden HSV applications.
TR6060 Configuration B
Configuration B changes the gearing substantially:
| Gear | Ratio |
|---|---|
| 1st | 2.98 |
| 2nd | 1.78 |
| 3rd | 1.30 |
| 4th | 1.00 |
| 5th | 0.74 |
| 6th | 0.50 |
| Reverse | 2.90 |
TREMEC lists this configuration at 500 lb-ft of input torque.
The combination of a 0.50 sixth gear and 0.74 fifth gear gives Configuration B a much taller upper gearing than Configuration A.
TR6060 Configuration C
Configuration C uses a 2.66:1 first gear and a 0.63:1 sixth gear:
| Gear | Ratio |
|---|---|
| 1st | 2.66 |
| 2nd | 1.78 |
| 3rd | 1.30 |
| 4th | 1.00 |
| 5th | 0.80 |
| 6th | 0.63 |
| Reverse | 2.90 |
TREMEC lists a 560 lb-ft input-torque specification for Configuration C.
This ratio family appears in several high-performance applications. For example, TREMEC application-specific documentation lists the 2.66/1.78/1.30/1.00/0.80/0.63 combination for the Cadillac CTS-V and ATS-V.
TR6060 Configuration D
Configuration D keeps the 2.66 first gear but changes several of the intermediate and overdrive ratios:
| Gear | Ratio |
|---|---|
| 1st | 2.66 |
| 2nd | 1.82 |
| 3rd | 1.30 |
| 4th | 1.00 |
| 5th | 0.76 |
| 6th | 0.50 |
| Reverse | 2.90 |
TREMEC lists Configuration D at 600 lb-ft of input torque.
This illustrates why two TR6060 transmissions can look nearly identical externally while having meaningfully different internal gearing.
The 2.66/1.82/1.30/1.00/0.76/0.50 arrangement is associated with certain Shelby GT500 applications in application-specific references.
TR6060 Configuration E
Configuration E moves toward taller lower gears while retaining a relatively high fifth-gear ratio:
| Gear | Ratio |
|---|---|
| 1st | 2.29 |
| 2nd | 1.61 |
| 3rd | 1.21 |
| 4th | 1.00 |
| 5th | 0.82 |
| 6th | 0.68 |
| Reverse | 3.11 |
TREMEC lists Configuration E at 650 lb-ft of input torque.
The 0.68 sixth gear is notably taller than the 0.50 and 0.63 sixth gears found in several other TR6060 configurations.
TR6060 Configuration F
Configuration F has the tallest first three gears of the six general TREMEC configurations:
| Gear | Ratio |
|---|---|
| 1st | 2.26 |
| 2nd | 1.58 |
| 3rd | 1.19 |
| 4th | 1.00 |
| 5th | 0.71 |
| 6th | 0.50 |
| Reverse | 2.90 |
TREMEC lists Configuration F at 650 lb-ft of input torque.
This configuration is particularly useful to understand when researching high-performance applications because the 2.26 first gear is substantially taller than the 3.01 first gear in Configuration A.
TR6060 Gear Ratios by Vehicle Application
The A-F designations in TREMEC’s general specification should not be treated as a complete vehicle interchangeability chart. Production transmissions can have application-specific gearing and other differences.
TREMEC’s application-specific documentation provides examples of the ratios used in particular vehicles.
| Application | 1st | 2nd | 3rd | 4th | 5th | 6th | Reverse |
|---|---|---|---|---|---|---|---|
| Chevrolet Camaro SS | 3.01 | 2.07 | 1.43 | 1.00 | 0.74* | 0.50* | 2.90* |
| Camaro ZL1 | 2.29 | 1.63 | 1.21 | 1.00 | 0.82 | 0.54 | 3.11 |
| Cadillac CTS-V | 2.66 | 1.78 | 1.30 | 1.00 | 0.80 | 0.63 | 2.90 |
| Cadillac ATS-V | 2.66 | 1.78 | 1.30 | 1.00 | 0.80 | 0.63 | 2.90 |
| Dodge Viper | 2.26 | 1.58 | 1.19 | 1.00 | 0.77 | 0.63 | 2.90 |
| Shelby GT500 | varies by year | varies | varies | 1.00 | varies | varies | varies |
*Exact ratio specifications can vary by model year and application, so the transmission’s identification and vehicle-specific documentation should be used when verifying a particular unit.
TREMEC’s published material confirms that the TR-6060 was produced with different ratio combinations rather than one universal gearset.
TR6060 Gear Ratios for the Dodge Viper
The Dodge Viper is one of the clearest examples of why application-specific identification matters.
A commonly documented Viper TR6060 ratio set is:
- 1st: 2.26
- 2nd: 1.58
- 3rd: 1.19
- 4th: 1.00
- 5th: 0.77
- 6th: 0.63
- Reverse: 2.90
The Viper configuration therefore uses a relatively tall first gear compared with TR6060 combinations such as the 3.01 first gear found in other applications.
For anyone buying a replacement Viper transmission, the vehicle application should be verified rather than assuming that any TR6060 has interchangeable internal gearing.
TR6060 Gear Ratios for the Camaro
The Chevrolet Camaro has used multiple TR6060 configurations.
Earlier Camaro SS applications are associated with the 3.01/2.07/1.43/1.00 ratio progression, while the ZL1 uses a different gearing arrangement. TREMEC’s application-specific documentation shows the ZL1 with a 2.29 first gear, 1.63 second, 1.21 third, 1.00 fourth, 0.82 fifth, and 0.54 sixth in one published configuration.
That difference is significant enough that “Camaro TR6060” alone is not sufficient information when ordering internal components or a complete transmission.
TR6060 Gear Ratios for the Shelby GT500
Ford’s Shelby GT500 is another example of changing TR6060 ratios across model years.
Modern Driveline documents three different GT500 ratio variations, including:
| GT500 application | 1st | 2nd | 3rd | 4th | 5th | 6th |
|---|---|---|---|---|---|---|
| 2007–2009 | 2.97 | 1.78 | 1.30 | 1.00 | 0.80 | 0.63 |
| 2010–2014 | 2.97 | 1.78 | 1.30 | 1.00 | 0.74 | 0.50 |
| 2013–2014 | 2.66 | 1.82 | 1.30 | 1.00 | 0.77 | 0.50 |
The overlap in model years is another reason that year, model, and transmission configuration should all be checked before ordering parts.
Why TR6060 First Gear Matters
First gear has a major effect on how the car leaves a stop.
A higher numerical first gear, such as 3.01:1, provides more torque multiplication through the transmission than a 2.26:1 first gear.
That can influence:
- Launch characteristics
- Low-speed acceleration
- Clutch engagement
- Traction demands
- Effective overall gearing
- Compatibility with the vehicle’s final-drive ratio
However, first gear should not be evaluated in isolation. The differential or final-drive ratio, tire diameter, engine torque curve, vehicle weight, and intended use all affect the resulting gearing.
Why TR6060 Fifth and Sixth Gears Matter
The upper gears have a different job.
A 0.50:1 sixth gear provides considerably more engine-speed reduction than a 0.68:1 sixth gear at the same vehicle speed.
This can affect:
- Highway engine RPM
- Cruising characteristics
- Fuel consumption
- Noise
- Passing behavior
- Compatibility with the rear-axle ratio
A transmission with a very tall sixth gear can be attractive for highway cruising, but whether it works well depends on the engine’s available torque and the vehicle’s final-drive ratio.
TR6060 Gear Ratios and Final Drive
Transmission gearing does not determine the overall gearing by itself.
The effective overall ratio in a given transmission gear is:
Transmission gear ratio × final-drive ratio
For example, a 0.50 sixth gear combined with a 3.73 rear axle produces a different overall ratio than the same 0.50 sixth gear combined with a 4.10 rear axle.
This is why changing the rear differential can substantially change how a TR6060-equipped vehicle feels without changing the transmission itself.
Which TR6060 Gear Ratio Is Best?
There is no single TR6060 ratio set that is best for every vehicle.
A suitable configuration depends on the complete drivetrain.
For a street car, you may care more about manageable first-gear behavior and comfortable highway cruising. A drag-oriented build may prioritize the relationship between first gear, tire diameter, final drive, and the engine’s torque curve. A road-course car may benefit from gearing that keeps the engine within its useful power band between corners.
The important point is to match the ratio set to the application rather than selecting a TR6060 based solely on the transmission name.
TR6060 Gear Ratios and Torque Ratings
TREMEC’s general TR-6060 specification associates its A-F configurations with input-torque figures ranging from 430 to 650 lb-ft.
| Configuration | TREMEC listed input torque |
|---|---|
| A | 430 lb-ft |
| B | 500 lb-ft |
| C | 560 lb-ft |
| D | 600 lb-ft |
| E | 650 lb-ft |
| F | 650 lb-ft |
These figures should not be interpreted as a universal horsepower or torque guarantee for every production TR6060.
TREMEC specifically notes that alternative ratios can result in different maximum input torque, while actual transmission performance also depends on the specific application and operating conditions.
How to Identify the Correct TR6060 Gear Ratio
If you are replacing or rebuilding a TR6060, do not rely on the external appearance alone.
Start with:
- Vehicle year
- Make and model
- Engine
- Original transmission application
- Transmission identification information
- Factory or manufacturer documentation
- Existing gearset information when rebuilding
For a used transmission, ask the seller for the exact application and internal specifications rather than simply accepting “TR6060” as the complete identification.
This becomes especially important when buying a rebuilt, modified, or performance-oriented transmission.
Can You Swap TR6060 Gearsets?
TR6060 internal components are not automatically interchangeable simply because both transmissions carry the TR6060 name.
The transmission was produced in different configurations for different applications, and the complete assembly can include application-specific components.
Before planning a gearset swap, verify:
- Gearset compatibility
- Mainshaft configuration
- Input shaft
- Countershaft
- Synchronizer components
- Transmission case
- Shift mechanism
- Bearing and blocker-ring compatibility
- Vehicle application
- Final-drive ratio
A transmission specialist familiar with the specific TR6060 version should verify compatibility before parts are purchased.
TR6060 Gear Ratios vs. T-56 Gear Ratios
The TR6060 evolved from the T-56 family, but it should not be treated as simply a T-56 with a different name.
TREMEC’s TR-6060 uses a six-speed rear-wheel-drive layout with an aluminum case, integrated clutch housing, and double- and triple-cone synchronizer arrangements.
Ratio sets also vary by application.
When comparing a T-56 and TR6060, look at the actual gear ratios and complete transmission specifications rather than assuming that one transmission’s gearset can substitute directly for the other.
Common TR6060 Gear Ratio Questions
What are the TR6060 gear ratios?
TREMEC publishes six general TR-6060 configurations, designated A through F. First gear ranges from 2.26:1 to 3.01:1, while sixth gear ranges from 0.50:1 to 0.68:1 in those published configurations.
What is the TR6060 first gear ratio?
Depending on configuration, TREMEC lists first-gear ratios of 3.01, 2.98, 2.66, 2.66, 2.29, and 2.26.
What is the TR6060 sixth gear ratio?
The published TREMEC configurations use sixth-gear ratios of 0.57, 0.50, 0.63, 0.50, 0.68, and 0.50.
What is the TR6060 fifth gear ratio?
Depending on configuration, fifth gear ranges from 0.71 to 0.84 in TREMEC’s published A-F specifications.
Does every TR6060 have the same gear ratios?
No. TREMEC publishes multiple TR-6060 ratio configurations, and production vehicles can use application-specific combinations.
What TR6060 has a 2.26 first gear?
The 2.26:1 first gear appears in TREMEC’s Configuration F and is also associated with certain Viper and other high-performance applications.
What TR6060 has a 2.66 first gear?
A 2.66:1 first gear appears in TREMEC’s C and D configurations and is used in several vehicle applications, including documented Cadillac and other performance applications.
Final Thoughts
The TR6060 gear ratios are one of the most important differences between otherwise similar-looking TREMEC six-speed transmissions. TREMEC’s published A-F configurations span a wide range of first, intermediate, and overdrive ratios, with different associated input-torque specifications.
For anyone buying, rebuilding, or swapping a TR6060, the transmission’s exact application matters. Vehicle year, model, engine, transmission configuration, internal gearing, and final-drive ratio should all be considered before assuming that one TR6060 is interchangeable with another.
If you’re sourcing a replacement or performance-built TR6060, verify the exact ratio set and application before purchasing. That is the safest way to make sure the transmission matches the drivetrain and the way the vehicle will be used.