Description
Product Overview
The TCI 6x 6-Speed GM 4L80E Automatic Transmission Packages 271701P40 is a performance-focused 6-speed automatic transmission package designed for compatible Ford engine applications that need stronger drivetrain capability, improved gear spacing, and electronic transmission control support. Built around the TCI 6x automatic transmission package concept, this kit gives builders six forward gears for quicker acceleration and better cruising performance in properly matched vehicles.
This package is identified by Manufacturer’s Part Number 271701P40, Summit Racing Part Number TCI-271701P40, and UPC 788120162289. These product identifiers help vehicle owners, mechanics, performance builders, pro touring shops, race-prep garages, restoration builders, service departments, and drivetrain specialists verify the correct TCI transmission package before ordering.
This kit is listed with a Ford bellhousing bolt pattern and includes a small block Ford bellhousing, making it relevant for compatible small block Ford engine builds. It also includes a 50 oz. external balance flywheel, which is an important application-specific fitment detail that should be confirmed against the engine before purchase.
The transmission is rated for 850 advertised horsepower, giving it strong appeal for street, pro touring, and race-oriented builds that require a serious automatic transmission package.
The six forward gear ratios are listed as 2.97, 2.31, 1.57, 1.18, 1.00, and 0.75, giving builders a wide gear spread for acceleration and overdrive cruising.
This package includes the transmission controller, wiring harness, transmission cooler, 12 quarts of transmission fluid, and dipstick. The flexplate is included, and the notes specify a 50 oz. external balance flywheel. Buyers should confirm the correct engine balance requirement before ordering.
The torque converter is not included, and the shifter is not included, so buyers should select the correct converter and shifter setup separately for the intended vehicle and driving use.
Fitment and Application Details
The TCI 271701P40 6x 6-Speed GM 4L80E automatic transmission package should be matched carefully to the intended vehicle, engine platform, balance requirement, electronics, converter, and driveline setup before ordering. Automatic transmission package fitment can vary by engine family, bellhousing pattern, flywheel or flexplate balance, converter setup, crankshaft pilot fitment, transmission mount, crossmember position, driveshaft length, yoke style, shifter compatibility, cooler routing, wiring layout, and installation hardware.
This package is listed with a Ford bellhousing bolt pattern and includes a small block Ford bellhousing. Buyers should confirm the exact small block Ford engine application, balance requirement, crankshaft compatibility, flywheel/flexplate requirements, converter bolt pattern, and starter compatibility before purchase.
Important fitment details to verify include vehicle year, make, model, engine family, small block Ford compatibility, Ford bellhousing bolt pattern, 50 oz. external balance requirement, flexplate/flywheel compatibility, torque converter selection, converter bolt pattern, crankshaft pilot fitment, transmission mount location, crossmember position, driveshaft length, yoke requirements, shifter compatibility, EZ-TCU controller setup, wiring harness routing, speed signal, throttle position input, cooler line routing, fluid requirements, dipstick location, and installation hardware.
The torque converter is not included, so buyers should select a converter based on engine output, camshaft profile, vehicle weight, tire size, rear axle ratio, intended driving style, and transmission setup.
The shifter is not included, so a compatible shifter and linkage or cable arrangement should be selected before installation.
The package includes the EZ-TCU transmission controller and harnesses, but buyers should still confirm all electronic-control requirements before purchase.
The transmission cooler is included, making the package more complete for performance use, but cooler mounting location, line routing, fittings, and installation hardware should still be planned before installation.
For a complete installation, additional components may be required, including a torque converter, shifter, shifter cable or linkage, cooler line fittings, transmission mount, crossmember hardware, driveshaft/yoke components, starter-related parts, seals, wiring accessories, and vehicle-specific installation hardware.
Build Quality and Reliability
The TCI 6x 6-Speed GM 4L80E Automatic Transmission Packages 271701P40 is built for performance applications that need a strong automatic transmission package with six forward gears and electronic-control support. The 850 advertised horsepower rating makes it a strong option for serious street, pro touring, and racing builds.
The six-speed gear spread gives this transmission package strong drivability advantages when matched correctly. The lower ratios help support acceleration, while the 0.75 overdrive gear helps reduce cruising rpm in properly configured applications.
The package includes the EZ-TCU transmission controller and harnesses, supporting electronic control planning for the transmission installation.
The included small block Ford bellhousing and 50 oz. external balance flywheel are important fitment details for compatible Ford engine applications.
The package also includes a transmission cooler, 12 quarts of transmission fluid, and dipstick, giving buyers several important supporting components in one kit.
The OEM-style aluminum case, stock chrome steel pan, case-fill design, and remanufactured construction give buyers useful details for installation planning and product identification.
Because the torque converter and shifter are not included, proper converter selection and shifter compatibility are essential for reliable installation and strong performance.
What Makes This Transmission Package a Strong Choice
The TCI 271701P40 6x 6-Speed automatic transmission package is a strong choice for buyers who need an 850HP-rated 6-speed automatic transmission kit for compatible small block Ford applications.
The six forward gears give builders more ratio flexibility than a traditional 3-speed or 4-speed automatic setup.
The listed gear ratios of 2.97, 2.31, 1.57, 1.18, 1.00, and 0.75 support quicker acceleration and improved cruising performance in properly matched vehicles.
The included EZ-TCU transmission controller and harnesses help support electronic-control installation.
The included small block Ford bellhousing supports compatibility planning for Ford-based builds.
The included 50 oz. external balance flywheel is a valuable application-specific component for compatible engines.
The included transmission cooler, 12 qt. of transmission fluid, and dipstick make this kit more complete for installation planning.
The 850 advertised horsepower rating makes it attractive for performance street, pro touring, and race applications.
Ideal Buyers and Use Cases
The TCI 6x 6-Speed GM 4L80E Automatic Transmission Packages 271701P40 is ideal for small block Ford performance builders, pro touring shops, restoration builders, custom vehicle shops, race-prep garages, mechanics, drivetrain specialists, service departments, and street-machine builders who need a serious 6-speed automatic transmission package.
It is suitable for compatible small block Ford applications requiring an 850HP-rated automatic transmission, six forward gears, Ford bellhousing bolt pattern, EZ-TCU controller, wiring harnesses, transmission cooler, dipstick, and 12 qt. of transmission fluid.
This product is useful for street performance builds, pro touring cars, race vehicles, restomods, custom small block Ford projects, performance cruisers, and vehicles needing a wider gear spread for acceleration and highway cruising.
It is also a practical choice for professional installers confirming required supporting components such as the torque converter, shifter, cooler-line routing, wiring setup, transmission mount, crossmember, driveshaft/yoke setup, starter compatibility, and installation hardware.
The best buyer for this package is someone who can confirm the engine platform, 50 oz. external balance requirement, converter selection, shifter setup, controller installation needs, and vehicle driveline layout before ordering.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | TCI 6x 6-Speed GM 4L80E Automatic Transmission Packages 271701P40 |
| Brand | TCI Auto |
| Manufacturer’s Part Number | 271701P40 |
| Part Type | Automatic Transmissions |
| Product Line | TCI 6x 6-Speed GM 4L80E Automatic Transmission Packages |
| Summit Racing Part Number | TCI-271701P40 |
| UPC | 788120162289 |
| Number of Gears | 6 |
| Bellhousing Bolt Pattern Manufacturer | Ford |
| Included Bellhousing | Small block Ford bellhousing |
| Transmission Shift Pattern | Forward |
| Valve Body Style | Automatic |
| Transmission Advertised Horsepower Rating | 850 |
| Torque Converter Included | No |
| Flexplate Included | Yes |
| Included Balance Component | 50 oz. external balance flywheel |
| Transmission Controller Included | Yes |
| Included Controller | EZ-TCU transmission controller |
| Wiring Harness Included | Yes |
| Transmission Cooler Included | Yes |
| Trans-Brake Included | No |
| Lockup Compatible | No |
| Transmission Pan Style | Stock |
| Transmission Pan Material | Steel |
| Transmission Pan Finish | Chrome |
| First Gear Ratio | 2.97 |
| Gear Ratios | 2.97 / 2.31 / 1.57 / 1.18 / 1.00 / 0.75 |
| Overdrive Gear Ratio | 0.75 |
| Transmission Case Style | OEM |
| Transmission Case Material | Aluminum |
| Transmission Case Finish | Natural |
| Transmission Shield Built In | No |
| Flexplate Shield Built In | No |
| Fluid Fill Location | Case |
| Transmission Fluid Included | Yes |
| Transmission Fluid Quantity Included | 12 qt. |
| Dipstick Included | Yes |
| Shifter Included | No |
| Remanufactured | Yes |
| Quantity | Sold as a kit |
| Fitment Support | Confirm compatibility before ordering |
Ordering Support and Fitment Guidance
Before ordering the TCI 6x 6-Speed GM 4L80E Automatic Transmission Packages 271701P40, confirm that the package matches your engine platform, balance requirement, vehicle layout, converter selection, and driveline setup.
Important details to verify include vehicle year, make, model, engine family, small block Ford compatibility, Ford bellhousing bolt pattern, 50 oz. external balance requirement, flexplate/flywheel compatibility, torque converter requirements, converter bolt pattern, crankshaft pilot fitment, starter compatibility, transmission mount location, crossmember position, driveshaft length, yoke requirements, shifter compatibility, EZ-TCU controller and harness setup, cooler line routing, fluid requirements, dipstick setup, and installation hardware.
This kit includes the small block Ford bellhousing, 50 oz. external balance flywheel, EZ-TCU transmission controller and harnesses, transmission cooler, 12 qt. of transmission fluid, and dipstick. It does not include the torque converter and does not include the shifter.
Our team can help confirm compatibility using the 271701P40 part number, engine details, vehicle setup, converter requirements, balance requirement, and drivetrain information before purchase.
Frequently Asked Questions
What is the TCI 271701P40 transmission package?
The TCI 271701P40 is a TCI 6x 6-Speed GM 4L80E automatic transmission package rated for 850 advertised horsepower. It is sold as a kit for compatible performance applications.
How many gears does this transmission have?
This transmission has six forward gears. The listed gear ratios are 2.97, 2.31, 1.57, 1.18, 1.00, and 0.75.
What is the first gear ratio?
The first gear ratio is 2.97, giving the transmission strong launch and acceleration potential in properly matched applications.
What is the overdrive ratio?
The top overdrive ratio is 0.75, helping support improved cruising performance when the vehicle is configured correctly.
What bellhousing does this kit include?
This package includes a small block Ford bellhousing and is listed with a Ford bellhousing bolt pattern.
Does this package include a flexplate or flywheel?
Yes. The package lists flexplate included and notes that it includes a 50 oz. external balance flywheel. Buyers should confirm compatibility with the engine’s balance requirement before ordering.
Does this package include a torque converter?
No. The torque converter is not included. Buyers should select the correct converter for the engine output, vehicle weight, axle ratio, tire size, and intended use.
Does this package include a controller and wiring harness?
Yes. This package includes the EZ-TCU transmission controller and harnesses.
Does this package include a transmission cooler?
Yes. The transmission cooler is included.
Does this package include transmission fluid and a dipstick?
Yes. This kit includes 12 qt. of transmission fluid and a dipstick.
Does this package include a shifter?
No. The shifter is not included. Buyers should choose a compatible shifter setup before installation.
Is this transmission lockup compatible?
No. This transmission package is listed as not lockup compatible.
Who is this package best for?
This package is best for small block Ford performance builders, pro touring shops, restoration builders, mechanics, race-prep garages, custom vehicle shops, and drivetrain specialists who need an 850HP-rated 6-speed automatic transmission package with included electronic-control support.
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