Description
Richmond Gear Super T-10 Plus Transmission Overview
The Richmond Gear Super T-10 Plus 4-Speed Transmission 7021520 is part of the Richmond Gear Super T-10 Plus 4-Speed Transmissions product line and is engineered for builders who need a strong, precise, and road-course-capable 4-speed manual transmission.
This model is listed under Manufacturer’s Part Number 7021520, Summit Racing Part Number RMG-7021520, and UPC 698231771112. It is sold individually and does not include a bellhousing, does not include a yoke, and does not include a shifter.
The transmission uses a 1.125-inch input shaft diameter, 26-spline input shaft, 32-spline output shaft, and 1.375-inch output shaft spline diameter. It also features a 12.000-inch tailshaft length and slip-on yoke style.
Designed for the rigors of a road course, the Richmond Gear T-10 Plus combines modern CNC machining, in-house treatment, race-proven synchro assemblies, and NASCAR-proven technology to deliver dependable 4-speed manual performance.
Vehicle Fitment and Common Applications
The Richmond Gear Super T-10 Plus 7021520 is intended for compatible performance builds where a durable 4-speed manual transmission is required. It is commonly selected for road-course cars, classic muscle builds, restoration projects, vintage performance vehicles, race cars, and high-performance street applications.
Fitment should be verified by checking bellhousing compatibility, clutch disc spline count, pilot bearing, flywheel setup, driveshaft length, output yoke, shifter type, transmission mount, crossmember location, tunnel clearance, speedometer requirements, and intended driving use.
This transmission requires a Long-style shifter, and the shifter is not included. Buyers should select a compatible shifter assembly separately.
Because the transmission has a 26-spline input shaft, the clutch disc must match the 26-spline input. Since it uses a 32-spline output shaft and slip-on yoke style, buyers should select the correct matching yoke and driveshaft setup before installation.
The bellhousing is not included, so the correct bellhousing must be selected based on the engine, chassis, clutch setup, and installation requirements.
4-Speed Road-Course Performance
The Richmond Gear Super T-10 Plus 4-Speed Transmission is designed for the demands of road-course driving, where shift quality, strength, gear spacing, and durability matter.
The gear ratios for this model are:
| Gear | Ratio |
|---|---|
| First Gear | 2.64:1 |
| Second Gear | 1.75:1 |
| Third Gear | 1.34:1 |
| Fourth Gear | 1.00:1 |
The 2.64 first gear ratio provides stronger low-speed multiplication than a tighter 2.43 first gear setup while still keeping a performance-oriented 4-speed ratio spread. The 1.00 fourth gear delivers direct-drive operation for a traditional manual transmission feel.
This ratio combination can work well for compatible road-course, performance street, and restoration builds where the rear axle ratio, tire diameter, vehicle weight, and engine torque curve are properly matched.
For builders who want a classic 4-speed driving experience with improved internal quality and race-proven construction, the Richmond Gear Super T-10 Plus 7021520 is a strong option.
Input, Output, and Driveline Details
The Richmond Gear 7021520 Super T-10 Plus uses a 1.125-inch input shaft diameter with 26 splines. Buyers should select a compatible 26-spline clutch disc during installation planning.
The output shaft uses 32 splines with a 1.375-inch output shaft spline diameter. The yoke style is listed as slip-on, and the yoke is not included. Buyers should choose the correct compatible slip yoke based on the output shaft and driveshaft requirements.
The tailshaft length is 12.000 inches, which should be compared with the existing drivetrain layout, driveshaft length, crossmember location, and transmission mount position.
Because manual transmission swaps and replacements can vary by vehicle, buyers should confirm input shaft requirements, pilot bearing compatibility, bellhousing depth, clutch release system, mount position, driveshaft requirements, and shifter location before ordering.
Case Design, Machining, and Build Quality
The Richmond Gear Super T-10 Plus 7021520 uses an aluminum case, helping reduce weight while maintaining strength for performance applications.
Richmond Gear T-10 Plus transmissions are designed using modern CNC machining and in-house treatment processes. These manufacturing steps help support consistent gear alignment, strong component fitment, and dependable operation.
The transmission uses race-proven synchro assemblies designed to deliver smooth engagement and durability under demanding use. Richmond also applies NASCAR-proven technology to support strength, shift consistency, and road-course reliability.
For builders who want a traditional 4-speed transmission with modern manufacturing quality, the Richmond Gear Super T-10 Plus provides a proven option for performance and restoration applications.
Included and Not Included Components
The Richmond Gear Super T-10 Plus 4-Speed Transmission 7021520 is sold individually as a transmission assembly.
The supplied specifications state:
| Component | Included |
| Transmission Assembly | Yes |
| Bellhousing | No |
| Yoke | No |
| Shifter | No |
The transmission requires a Long-style shifter, which must be selected separately. Buyers must also plan for the correct bellhousing, clutch disc, flywheel, pilot bearing, release bearing, clutch linkage or hydraulic system, transmission mount, crossmember, slip yoke, driveshaft, speedometer components, fluid, and installation hardware.
Because this transmission is listed as remanufactured: no, it is not a rebuilt used transmission.
Key Benefits for Performance Builders
The Richmond Gear Super T-10 Plus 7021520 gives performance builders a strong 4-speed manual transmission with road-course durability and traditional driving feel.
The first major benefit is balanced 4-speed performance. The 2.64 first gear, 1.75 second gear, 1.34 third gear, and 1.00 fourth gear create a practical ratio spread for compatible performance builds.
The second benefit is road-course-ready construction. The transmission is designed for demanding driving and uses race-proven synchro assemblies with NASCAR-proven technology.
The third benefit is fitment planning clarity. The listed 26-spline input, 32-spline output, 12-inch tailshaft, slip-on yoke style, and Long-style shifter requirement help buyers choose compatible supporting parts.
The fourth benefit is quality manufacturing. CNC machining, in-house treatment, and an aluminum case support consistent performance and long-term reliability.
Who This Transmission Is Best For
The Richmond Gear Super T-10 Plus 4-Speed Transmission 7021520 is best for builders who need a durable 4-speed manual transmission for compatible road-course, racing, muscle car, restoration, and high-performance street applications.
It is suitable for professional builders, restoration shops, road-racing teams, performance garages, classic car owners, and enthusiasts who want a traditional manual transmission with proven strength.
This product is a strong choice for buyers who need a 26-spline input shaft, 32-spline output shaft, 2.64 first gear, 12-inch tailshaft, slip-on yoke style, aluminum case, and Long-style shifter compatibility.
It is not intended for buyers who need a complete conversion package with bellhousing, yoke, shifter, clutch, flywheel, crossmember, mount, driveshaft, linkage, fluid, or installation hardware included. Those components must be selected separately based on the vehicle and drivetrain setup.
Technical Details and Included Specifications
The Richmond Gear Super T-10 Plus 4-Speed Transmission 7021520 is a 4-speed manual performance transmission built with a strong aluminum case, road-course-focused construction, and clear driveline specifications.
| Specification | Details |
| Product Type | Manual transmission |
| Brand | Richmond Gear |
| Product Line | Richmond Gear Super T-10 Plus 4-Speed Transmissions |
| Manufacturer Part Number | 7021520 |
| Summit Racing Part Number | RMG-7021520 |
| UPC | 698231771112 |
| Number of Gears | 4 |
| Input Shaft Diameter | 1.125 in. |
| Input Spline Quantity | 26 |
| Output Shaft Spline Quantity | 32 |
| Output Shaft Spline Diameter | 1.375 in. |
| Tailshaft Length | 12.000 in. |
| Bellhousing Included | No |
| Yoke Included | No |
| Yoke Style | Slip-on |
| Shifter Included | No |
| Shifter Style Required | Long |
| First Gear Ratio | 2.64:1 |
| Second Gear Ratio | 1.75:1 |
| Third Gear Ratio | 1.34:1 |
| Fourth Gear Ratio | 1.00:1 |
| Case Material | Aluminum |
| Manufacturing Notes | CNC machining and in-house treatment |
| Synchronizer Notes | Race-proven synchro assemblies |
| Technology Notes | NASCAR-proven technology |
| Remanufactured | No |
| Quantity | Sold individually |
| Intended Use | Road-course, performance street, racing, restoration, and muscle car applications |
Fitment Support and Ordering Notes
Before ordering the Richmond Gear Super T-10 Plus 7021520, buyers should confirm vehicle fitment and supporting components. Important details include engine and bellhousing compatibility, clutch disc spline count, flywheel, pilot bearing, release bearing, input shaft requirements, output shaft spline count, yoke selection, driveshaft length, shifter type, transmission mount, crossmember, tunnel clearance, speedometer setup, fluid requirements, and intended driving use.
This transmission does not include the bellhousing, does not include the yoke, and does not include the shifter. It requires a Long-style shifter, and buyers should choose a compatible shifter separately.
Customers can also compare this product with other Richmond Gear manual transmissions, Super T-10 Plus transmissions, compatible bellhousings, clutch kits, flywheels, Long-style shifters, yokes, driveshaft components, transmission mounts, and installation hardware when planning a complete drivetrain build.
Frequently Asked Questions
What is the Richmond Gear Super T-10 Plus 7021520 designed for?
The Richmond Gear Super T-10 Plus 7021520 is designed for road-course, performance street, racing, restoration, and muscle car applications that need a strong 4-speed manual transmission.
How many gears does this transmission have?
This transmission has 4 forward gears. The ratios are 2.64 first, 1.75 second, 1.34 third, and 1.00 fourth.
Does this transmission include a bellhousing?
No. The bellhousing is not included. Buyers must select the correct bellhousing based on the engine, clutch setup, chassis, and installation requirements.
Does this Richmond Gear transmission include a shifter?
No. The shifter is not included. This transmission requires a Long-style shifter, which must be purchased separately.
What clutch disc spline count is required?
This transmission uses a 26-spline input shaft, so buyers need a compatible 26-spline clutch disc.
What output yoke does this transmission use?
The transmission uses a 32-spline output shaft with a 1.375-inch output spline diameter and slip-on yoke style. The yoke is not included.
Is this transmission remanufactured?
No. The supplied specification states Remanufactured: No. This is a Richmond Gear Super T-10 Plus 4-speed manual transmission sold individually.
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