Description
Ford Performance Parts Tremec M-7003-TKX81 – Product Overview
The Ford Performance Parts Tremec 6-Speed Transmissions M-7003-TKX81 is a performance-focused manual transmission supplied by Ford Performance Parts. Although the product line is listed as Ford Performance Parts Tremec 6-Speed Transmissions, the supplied specifications for this model list Number of Gears: 5, with fifth gear shown as 0.81:1.
This product is identified by Manufacturer’s Part Number M-7003-TKX81, Summit Racing Part Number FMS-M7003TKX81, and UPC 756122015506. These identifiers help buyers, installers, mechanics, and parts departments confirm the correct transmission before ordering.
The transmission uses a 5-speed gear layout with 2.87 first gear, 1.89 second gear, 1.28 third gear, 1.00 fourth gear, and 0.81 fifth gear. This ratio spread gives buyers strong manual control through the lower gears while providing overdrive capability in fifth gear.
The 1.125-inch input shaft diameter and 26-spline input shaft are important fitment details because the clutch disc must match the input spline configuration. The transmission also uses a 31-spline output shaft, so the output yoke and driveshaft setup must be selected correctly.
This unit includes a shifter, but it does not include a bellhousing and does not include a yoke. Buyers should confirm all required supporting parts before purchase.
Fitment and Application Details
The Ford Performance Parts Tremec M-7003-TKX81 is intended for performance manual drivetrain applications where the supplied transmission specifications match the vehicle and installation setup.
Fitment should be confirmed before ordering by checking the vehicle platform, engine, bellhousing requirements, clutch disc spline count, flywheel, pilot bearing, clutch release system, transmission mount, crossmember position, driveshaft length, output yoke, tunnel clearance, and shifter position.
Because this transmission uses a 26-spline input shaft, it requires a compatible 26-spline clutch disc. Because it uses a 31-spline output shaft, the correct output yoke must be selected separately.
The bellhousing is not included, so buyers should choose the correct bellhousing based on the engine, clutch system, and intended application. The yoke is not included, so the driveline connection must also be confirmed before installation.
The shifter is included, which gives buyers a stronger starting point than a transmission-only listing. However, shifter position, console clearance, tunnel fitment, and driver reach should still be checked before installation.
For a complete drivetrain setup, buyers may also need a compatible bellhousing, clutch kit, flywheel, pilot bearing, release bearing, output yoke, driveshaft parts, transmission mount, fluid, wiring, and installation hardware.
Build Quality and Reliability
The Ford Performance Parts Tremec M-7003-TKX81 is built with an aluminum case, giving the transmission a strong and practical housing for performance use while helping reduce unnecessary weight.
The supplied Ford Performance Parts description states that these Tremec transmissions are built for demanding street or strip applications. It also notes that the hardened internals are designed to provide quick and precise shifts throughout the rev range.
This transmission’s 2.87 first gear supports strong low-speed engagement in compatible builds. The 1.00 fourth gear provides direct-drive operation, while the 0.81 fifth gear gives the transmission overdrive capability for improved cruising behavior when properly matched with the rear axle ratio and tire size.
The 26-spline input shaft and 31-spline output shaft provide clear drivetrain specifications for installers. These details help ensure the correct clutch disc, yoke, and related drivetrain parts are selected before installation.
The product is listed as not remanufactured, meaning it is not supplied as a rebuilt used transmission. It is sold individually as a Ford Performance Parts Tremec manual transmission.
What Makes This Transmission a Strong Choice
The Ford Performance Parts Tremec M-7003-TKX81 is a strong choice for buyers who need a performance-ready manual transmission with Ford Performance branding, Tremec construction, and practical overdrive gearing.
One of its key strengths is the 0.81 fifth gear. This overdrive ratio can help reduce engine rpm during cruising when the drivetrain is properly matched, making the transmission useful for performance vehicles that are also driven regularly.
Another important feature is the 2.87 first gear, which gives the transmission strong starting leverage in compatible applications.
The combination of 26-spline input and 31-spline output provides clear requirements for clutch and driveline setup. This makes it easier for buyers and installers to plan the correct supporting components.
The included shifter adds practical value, especially for buyers who want a more complete starting point for their manual transmission installation.
The aluminum case, performance-focused gear ratios, and Ford Performance Parts identification make the M-7003-TKX81 a strong option for buyers planning a serious manual drivetrain build.
Ideal Buyers and Use Cases
The Ford Performance Parts Tremec M-7003-TKX81 is best for performance vehicle owners, hot rod builders, drivetrain installers, mechanics, restoration shops, and serious street or strip builders who need a strong manual transmission.
It is suitable for buyers who need a 5-speed manual transmission with a 26-spline input shaft, 31-spline output shaft, 2.87 first gear, 0.81 fifth gear, aluminum case construction, and included shifter.
This product is also useful for builds where overdrive drivability, precise shift control, and Ford Performance-backed Tremec construction are important.
It is not a complete installation kit. The bellhousing is not included, and the yoke is not included. Buyers should confirm all supporting drivetrain components before ordering.
The best buyer for this transmission is someone who has already confirmed vehicle fitment, bellhousing compatibility, clutch disc spline count, output yoke requirements, driveshaft length, shifter position, transmission mount location, and complete installation needs.
Technical Specifications
| Specification | Details |
|---|---|
| Product Name | Ford Performance Parts Tremec 6-Speed Transmissions M-7003-TKX81 |
| Brand | Ford Performance Parts |
| Manufacturer’s Part Number | M-7003-TKX81 |
| Part Type | Manual Transmissions |
| Product Line | Ford Performance Parts Tremec 6-Speed Transmissions |
| Summit Racing Part Number | FMS-M7003TKX81 |
| UPC | 756122015506 |
| Number of Gears | 5 |
| Input Shaft Diameter | 1.125 in. |
| Input Spline Quantity | 26 |
| Output Shaft Spline Quantity | 31 |
| Bellhousing Included | No |
| Yoke Included | No |
| Shifter Included | Yes |
| First Gear Ratio | 2.87:1 |
| Second Gear Ratio | 1.89:1 |
| Third Gear Ratio | 1.28:1 |
| Fourth Gear Ratio | 1.00:1 |
| Fifth Gear Ratio | 0.81:1 |
| Case Material | Aluminum |
| Internal Design | Hardened internals listed in supplied product description |
| Application Focus | Street, strip, hot rod, and performance drivetrain builds |
| Remanufactured | No |
| Quantity | Sold individually |
| Fitment Note | Product line states 6-speed, but supplied specifications list 5 gears |
Ordering Support and Fitment Guidance
Before ordering the Ford Performance Parts Tremec M-7003-TKX81, buyers should confirm the complete drivetrain setup for the intended vehicle.
Important fitment details include vehicle platform, engine, bellhousing, clutch disc spline count, flywheel, pilot bearing, clutch release system, output yoke, driveshaft length, transmission mount, crossmember location, tunnel clearance, shifter position, and installation hardware.
This transmission uses a 1.125-inch 26-spline input shaft, so the clutch disc must match that spline count. It also uses a 31-spline output shaft, so the correct output yoke must be selected separately.
The shifter is included, but the bellhousing is not included and the yoke is not included. Buyers should plan these parts before installation.
For a complete installation, buyers may also need clutch components, flywheel, pilot bearing, release bearing, compatible bellhousing, output yoke, driveshaft parts, transmission mount, fluid, wiring, and vehicle-specific hardware.
The Ford Performance Parts Tremec M-7003-TKX81 is built for buyers who want a performance-focused Tremec manual transmission with overdrive capability, crisp shifting, aluminum construction, and Ford Performance Parts support.
Frequently Asked Questions
What is the Ford Performance Parts Tremec M-7003-TKX81?
The Ford Performance Parts Tremec M-7003-TKX81 is a manual transmission listed under Ford Performance Parts. The supplied specifications show a 5-speed gear layout, 26-spline input shaft, 31-spline output shaft, aluminum case, and included shifter.
How many gears does this transmission have?
The supplied specifications list Number of Gears: 5. The gear ratios are 2.87 first, 1.89 second, 1.28 third, 1.00 fourth, and 0.81 fifth.
Does this transmission include a shifter?
Yes. The supplied specifications state that the shifter is included with the Ford Performance Parts Tremec M-7003-TKX81.
Does this transmission include a bellhousing or yoke?
No. The bellhousing is not included, and the yoke is not included. Buyers should select compatible parts based on the engine, clutch setup, output shaft, and drivetrain requirements.
What clutch disc does this transmission require?
This transmission uses a 1.125-inch 26-spline input shaft, so it requires a compatible 26-spline clutch disc. Buyers should also confirm flywheel, pilot bearing, clutch release, and bellhousing compatibility before installation.
What is the fifth gear ratio?
The fifth gear ratio is 0.81:1. This gives the transmission overdrive capability for improved cruising behavior when matched with the correct rear axle ratio, tire size, and vehicle setup.
Is this transmission remanufactured?
No. The supplied specifications list Remanufactured: No. This transmission is sold individually as part of the Ford Performance Parts Tremec transmission product line.
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