Tremec TKX Manual Transmissions TCET17805

Description

Tremec TKX TCET17805 Transmission Overview

The Tremec TKX Manual Transmissions TCET17805 is a modern 5-speed manual transmission built for performance vehicles that need strength, smooth shifting, and overdrive capability. It belongs to the Tremec TKX Manual Transmissions product line and carries manufacturer part number TCET17805.

This model is listed with Summit Racing part number REM-TCET17805 and is sold individually. It uses a GM style case, making it suitable for select GM-based performance builds, classic car upgrades, and restomod applications.

The TKX series is designed for vehicles that need a compact transmission with serious power-handling ability. With a listed 600 lb.-ft. torque capacity, engine speed capability up to 8,000 rpm, and shifts up to 7,500 rpm, this transmission is built for demanding street and performance use.

The 0.68:1 fifth gear gives this transmission overdrive capability, making it useful for drivers who want strong acceleration through the lower gears and more comfortable highway cruising in fifth gear.

For builders upgrading from an older 4-speed manual, the Tremec TKX TCET17805 offers a stronger, more refined transmission option while keeping the control and driving feel of a manual gearbox.

Vehicle Fitment and Common Applications

The Tremec TKX TCET17805 transmission is designed for select GM-style applications. It can bolt up to a standard GM Muncie bellhousing or be used with a compatible QuickTime bellhousing, depending on the vehicle and installation setup.

Fitment should always be verified before ordering. Important details include bellhousing compatibility, clutch disc spline count, output shaft spline count, yoke requirements, shifter position, transmission tunnel clearance, crossmember location, and driveshaft length.

This transmission uses a 1.125-inch input shaft diameter with a 26-spline input shaft. Because of this, it requires a compatible 26-spline clutch disc. The output shaft uses 31 splines, so the correct yoke and driveshaft setup must also be confirmed.

The TKX design supports multiple applications with three available shifter locations across the product line. Its compact, end-loaded design helps provide clearance in many transmission tunnels, making it a popular option for muscle cars, classic GM vehicles, pro-touring builds, and restomod projects.

Buyers should not rely on vehicle brand alone. Correct transmission fitment depends on the full drivetrain combination, including engine, bellhousing, clutch, driveshaft, shifter location, crossmember, and vehicle floor clearance.

Gear Ratios and Driving Feel

The Tremec TKX Manual Transmissions TCET17805 uses a 5-speed gear set designed to support strong acceleration, smooth road use, and improved cruising.

The first gear ratio is 2.87:1, giving the vehicle useful low-speed pull without being overly aggressive for many street performance combinations. Second gear is 1.89:1, third gear is 1.28:1, and fourth gear is 1.00:1, which provides direct drive.

The fifth gear ratio is 0.68:1, providing overdrive for highway driving. When matched with the correct rear axle ratio and tire size, this can help reduce cruising rpm and make the vehicle more comfortable on longer drives.

The TKX series is known for improved shift quality compared with many older transmission designs. It uses multi-cone synchronizers and hybrid synchronizer rings made from sintered bronze and carbon to support smoother, more controlled gear engagement.

For drivers, the result is a transmission that feels precise and performance-focused while still being practical for street-driven vehicles.

Case Design and Internal Strength

The Tremec TKX TCET17805 uses an aluminum case with a strong 3-piece housing design. This housing includes the main case, intermediate plate, and rear extension.

This 3-piece aluminum construction improves structural stiffness and case strength. A rigid case is important in performance applications because torque load can place stress on the transmission housing and internal gear alignment.

All gears and shafts are made from special grade steel, listed as ASTM 4615, to support increased torque carrying ability. The transmission also uses wider gear widths to help increase gear life and torque capacity.

The internal gear support system includes caged needle bearings, which help reduce end play on the gears. This contributes to smoother operation, improved durability, and better control under load.

The TKX is also designed with noise, vibration, and harshness control in mind. The gear layout helps manage internal stress while reducing unwanted drivetrain harshness during operation.

Shifter and Driver Control

This transmission includes a high-performance short-throw billet aluminum shifter. The shifter is designed to provide clean, crisp gear changes while helping isolate road noise from the cabin.

A good shifter makes a major difference in a manual transmission upgrade. The included shifter gives drivers a more direct and controlled feel compared with worn factory shifters or older manual transmission setups.

The transmission also uses a robust internal 3-rail shift system with steel shift components. This design supports dependable gear engagement and a more confident shifting experience under performance driving conditions.

For restomod builders and street performance drivers, this combination of short-throw shifting, strong internal shift design, and modern synchronizer technology gives the TKX a more refined feel than many traditional manual gearbox options.

Because shifter position can affect interior fitment, buyers should still confirm that the shifter location works with the vehicle’s floor opening, console layout, seat position, and driving preference.

Key Benefits for Performance Builds

The main benefit of the Tremec TKX Manual Transmissions TCET17805 is its balance of strength, compact fitment, overdrive cruising, and shift quality.

With 600 lb.-ft. torque capacity, this transmission is suitable for many serious street and performance engine combinations. It gives builders more confidence than a weaker factory-style transmission in upgraded vehicles.

The 5-speed layout also gives the vehicle more flexibility than a traditional 4-speed manual. Lower gears support acceleration, while the 0.68 fifth gear overdrive improves highway usability.

The GM style case helps make this model suitable for select GM applications, while the 26-spline input and 31-spline output give buyers clear technical details for clutch and driveline planning.

The included short-throw billet aluminum shifter adds practical value because buyers do not need to source a basic shifter separately.

For professional shops, this transmission is a strong option when upgrading classic or performance vehicles that need better strength, better shifting, and better drivability.

Who This Transmission Is Best For

This transmission is best for performance drivers, classic car owners, restoration shops, and restomod builders working on compatible GM-style manual transmission applications.

It is a strong choice for buyers who want a 5-speed manual transmission with overdrive, modern shift quality, and a strong torque rating. It is especially useful for muscle cars and street performance builds where the original transmission no longer matches the vehicle’s power level or driving expectations.

The Tremec TKX TCET17805 is also suitable for pro-touring builds, weekend performance cars, street-driven classics, and upgraded vehicles that need better highway cruising than a traditional 4-speed manual gearbox can provide.

This product is not ideal for buyers looking for a complete installation kit. It does not include a bellhousing or yoke, and it requires a compatible 26-spline clutch disc.

It is best for buyers who understand drivetrain fitment or are working with a qualified installer who can match the transmission with the correct bellhousing, clutch, yoke, driveshaft, crossmember, and supporting hardware.

Technical Details and Included Components

The Tremec TKX Manual Transmissions TCET17805 is a new 5-speed manual transmission with a GM style case. It is part of the Tremec TKX product line and is sold individually.

This transmission uses a 1.125-inch input shaft diameter, 26-spline input shaft, and 31-spline output shaft. It does not include a bellhousing or yoke, but it does include a shifter.

The gear ratios are 2.87:1 first, 1.89:1 second, 1.28:1 third, 1.00:1 fourth, and 0.68:1 fifth. This gives the transmission a strong balance of launch, mid-range control, direct drive, and overdrive cruising.

The case is made from aluminum, and the transmission is not remanufactured. It is sold as a new unit.

Fitment Support and Ordering Notes

Before ordering the Tremec TKX TCET17805, buyers should confirm that the transmission is correct for the vehicle and drivetrain setup. Important details include bellhousing type, clutch spline count, output shaft spline count, yoke compatibility, shifter location, transmission tunnel clearance, driveshaft length, crossmember position, and wiring needs.

This transmission can bolt up to a standard GM Muncie bellhousing or be used with a compatible QuickTime bellhousing. A 26-spline clutch disc is required because the input shaft uses 26 splines.

The transmission does not include a bellhousing or yoke, so these components must be selected separately. Buyers should also confirm that the included shifter location works for the vehicle interior and console layout.

The TKX includes useful built-in support features such as a reverse light switch and cruise control safety functionality. These features can help with street-driven builds where drivability and safety features matter.

Customers can also compare this unit with other manual transmissions, related Tremec TKX transmission options, compatible bellhousings, clutch kits, yokes, driveshaft components, shifters, and installation hardware.

Frequently Asked Questions

What is the Tremec TKX TCET17805 designed for?

The Tremec TKX TCET17805 is designed for select GM-style applications that need a strong 5-speed manual transmission. It is commonly used in muscle cars, restomods, classic vehicle upgrades, and performance street builds where torque capacity, shift quality, and overdrive cruising are important.

Does this transmission fit a GM Muncie bellhousing?

Yes. The Tremec TKX line can bolt up to a standard GM Muncie bellhousing or be used with a compatible QuickTime bellhousing. Buyers should still confirm the full drivetrain setup before ordering.

What clutch disc does this transmission require?

This transmission uses a 26-spline input shaft, so it requires a compatible 26-spline clutch disc. The input shaft diameter is 1.125 inches, and the clutch system should be matched to the engine, bellhousing, and intended use.

Does the Tremec TKX TCET17805 include a shifter?

Yes. This transmission includes a high-performance short-throw billet aluminum shifter. The shifter is designed to provide clean, crisp gear changes while helping isolate road noise during operation.

What is the torque capacity of this transmission?

The Tremec TKX is rated for 600 lb.-ft. of torque. It is also capable of engine speeds up to 8,000 rpm and shifts up to 7,500 rpm, making it suitable for many serious street and performance builds.

Does this transmission include a bellhousing or yoke?

No. The Tremec TKX TCET17805 does not include a bellhousing or yoke. These parts must be selected separately based on the vehicle, engine, clutch setup, driveshaft, and installation requirements.

What is the benefit of the 0.68 fifth gear?

The 0.68:1 fifth gear provides overdrive for highway driving. When matched with the right rear axle ratio and tire size, it can reduce cruising rpm and make the vehicle more comfortable for longer drives.