Tremec T-56 Magnum XL Manual Transmissions TUKT12021

Description

Tremec T-56 Magnum XL Manual Transmissions TUKT12021 – Product Overview

The Tremec T-56 Magnum XL Manual Transmissions TUKT12021 is a performance-focused 6-speed manual transmission designed for late model vehicles that require a more precise, direct-shift driving experience.

This transmission is part of the Tremec T-56 Magnum XL Manual Transmissions product line and is identified by Manufacturer’s Part Number TUKT12021 and Summit Racing Part Number REM-TUKT12021.

The Magnum XL platform is built around an extended length rear extension housing, which is intended for late model performance applications equipped with factory semi-remote shifters. This design gives owners a more rigid direct-shift feel and helps reduce the loose or rubbery gear-change sensation common in some remote-shifter setups.

This model is supplied with the shifter, shift knob, crossmember, scatter shield, and 7-tooth internal speedometer drive gear. It does not include a bellhousing and does not include a yoke, so buyers should confirm all supporting drivetrain parts before ordering.

With 700 lb-ft of torque capacity and rpm capability nearing 8,000 rpm, the Tremec T-56 Magnum XL Manual Transmissions TUKT12021 is built for demanding street, performance, and track-oriented applications where strength and shift quality matter.

Fitment and Application Details

The Tremec T-56 Magnum XL Manual Transmissions TUKT12021 is intended for late model performance applications that use a factory semi-remote shifter layout and need the direct-shift advantages of the Magnum XL design.

The extended rear extension housing is one of the most important fitment details. It positions the shifter for applications where a standard transmission layout may not place the shifter correctly for the vehicle interior.

Before ordering, buyers should confirm the vehicle platform, engine, bellhousing requirements, clutch disc spline count, flywheel, pilot bearing, clutch release system, output yoke, driveshaft length, transmission mount, crossmember fitment, tunnel clearance, speedometer setup, and shifter position.

This transmission uses a 1.125-inch input shaft diameter with 26 input splines, so a compatible 26-spline clutch disc is required. It also uses a 31-spline output shaft, and the correct yoke must be selected separately because the yoke is not included.

The product includes a crossmember and scatter shield, but buyers should still verify whether all included components match the intended application. Installation needs can vary based on vehicle year, model, engine setup, drivetrain layout, and supporting components.

For buyers browsing the manual transmissions category, this product fits naturally among high-performance 6-speed transmission assemblies, clutch components, flywheels, bellhousings, yokes, speedometer components, and drivetrain installation parts.

Build Quality and Reliability

The Tremec T-56 Magnum XL Manual Transmissions TUKT12021 is built for demanding performance use with the strength expected from the Magnum transmission line.

The transmission features an aluminum case, helping provide strength while keeping weight lower than heavier case materials. Aluminum construction is commonly valued in performance transmissions because it supports structural integrity without unnecessary weight.

The Magnum XL offers 700 lb-ft of torque capacity, making it suitable for high-output performance applications when paired with the correct clutch, driveshaft, rear differential, mounts, and supporting drivetrain components.

Tremec also uses race-proven synchronizer technology in the Magnum XL platform. This supports crisp, low-effort shifts and helps the transmission handle higher-rpm driving conditions.

The supplied product information states that the Tremec T-56 Magnum XL is equipped to deal with all but the highest revving engines, with rpm capacity nearing 8,000 rpm straight out of the box.

The direct-shift design is also a major reliability and feel advantage. By reducing the loose sensation associated with some factory semi-remote shifter arrangements, the Magnum XL helps deliver more confident manual gear engagement.

What Makes This Transmission a Strong Choice

The Tremec T-56 Magnum XL Manual Transmissions TUKT12021 is a strong choice for buyers who need a high-capacity manual transmission with sharper shift feel and late model fitment advantages.

One of its strongest features is the direct-shift design. Late model vehicles with semi-remote shifters can sometimes feel disconnected during gear changes. The Magnum XL layout gives the driver a more rigid and precise shift connection.

Another important advantage is the 700 lb-ft torque capacity. This gives the transmission the strength needed for many serious performance builds when installed with the correct supporting components.

The 6-speed gear layout provides both performance and cruising value. The 2.97 first gear supports strong launch behavior, while the 0.80 fifth gear and 0.63 sixth gear provide double-overdrive capability.

The included shifter, shift knob, crossmember, scatter shield, and 7-tooth internal speedometer drive gear also add practical value for buyers planning a performance drivetrain upgrade.

The transmission’s crisp, low-effort shift quality makes it well suited for drivers who want performance without sacrificing drivability. It is built for buyers who care about strong torque capacity, clean gear engagement, and a more connected manual driving experience.

Ideal Buyers and Use Cases

The Tremec T-56 Magnum XL Manual Transmissions TUKT12021 is best for late model performance vehicle owners, drivetrain installers, performance shops, and builders who need a strong 6-speed manual transmission with direct-shift operation.

It is suitable for buyers upgrading from a factory semi-remote shifter setup where the original shift feel is loose, rubbery, or less precise than desired.

This transmission is also a strong fit for performance street cars, pro-touring builds, track-focused vehicles, and high-output applications that require 700 lb-ft torque capacity and double-overdrive gearing.

It is a practical choice for buyers who need an included shifter, shift knob, crossmember, and scatter shield, while still understanding that the bellhousing and yoke must be selected separately.

This product is not a complete universal installation kit. Buyers should confirm application fitment, bellhousing compatibility, yoke requirements, clutch setup, driveshaft length, tunnel clearance, and all installation hardware before ordering.

The best buyer for this product is someone who wants a premium manual transmission upgrade with strong torque handling, crisp shift engagement, and fitment support for late model performance applications using the Magnum XL layout.

Technical Specifications

Ordering Support and Fitment Guidance

Before ordering the Tremec T-56 Magnum XL Manual Transmissions TUKT12021, buyers should confirm the full drivetrain setup and intended application.

Important fitment details include the vehicle platform, engine, bellhousing selection, clutch disc spline count, flywheel, pilot bearing, clutch release system, output yoke, driveshaft length, transmission mount, crossmember fitment, tunnel clearance, speedometer setup, wiring, and shifter position.

This transmission includes the shifter, shift knob, crossmember, scatter shield, and 7-tooth internal speedometer drive gear. However, the bellhousing is not included and the yoke is not included.

Because the input shaft uses 26 splines, the clutch disc must match the transmission. Because the output shaft uses 31 splines, the correct yoke must be selected separately.

Buyers should also confirm whether any additional drivetrain parts are needed, including clutch components, flywheel, pilot bearing, release bearing, bellhousing, yoke, driveshaft parts, transmission mount, fluid, wiring connectors, and installation hardware.

The Tremec T-56 Magnum XL Manual Transmissions TUKT12021 is designed for buyers who want high torque capacity, direct-shift performance, crisp engagement, and late model fitment support in a 6-speed manual transmission.

Frequently Asked Questions

What is the Tremec T-56 Magnum XL Manual Transmissions TUKT12021?

The Tremec T-56 Magnum XL Manual Transmissions TUKT12021 is a 6-speed manual transmission designed for late model performance applications. It uses an extended length rear extension housing and direct-shift layout for improved shift feel.

What torque capacity does this transmission have?

The Tremec T-56 Magnum XL Manual Transmissions TUKT12021 has a torque capacity of 700 lb-ft. This supports demanding performance applications when installed with the correct clutch, yoke, bellhousing, driveshaft, and supporting drivetrain parts.

Does this Tremec Magnum XL include a shifter?

Yes. The supplied specifications state that the shifter is included. The notes also state that the transmission includes a shift knob, crossmember, scatter shield, and 7-tooth internal speedometer drive gear.

Does this transmission include a bellhousing or yoke?

No. The bellhousing is not included, and the yoke is not included. Buyers should select compatible components based on the engine, clutch system, output shaft, and drivetrain layout.

What are the gear ratios for the TUKT12021?

The gear ratios are 2.97 first, 2.10 second, 1.46 third, 1.00 fourth, 0.80 fifth, and 0.63 sixth. The fifth and sixth gears provide double-overdrive performance.

Why does the Magnum XL use an extended rear extension housing?

The extended rear extension housing is designed for late model performance applications with factory semi-remote shifters. It helps provide a more rigid direct-shift feel and reduces the loose, rubbery gear-change sensation.

Is the Tremec T-56 Magnum XL TUKT12021 remanufactured?

No. The supplied specifications list Remanufactured: No. This transmission is sold individually as part of the Tremec T-56 Magnum XL Manual Transmissions product line.