Description
The Ford Performance M-7003-TKX81 is the latest generation Tremec TKX-600 5-speed manual transmission, designed to replace the legendary TKO with smoother shifting, a more compact case, and increased durability. Rated to handle 600 lb-ft (813 Nm) of torque, the TKX is perfect for powerful street cars, muscle cars, and custom Ford builds.
Featuring hybrid carbon/bronze synchronizers, the TKX delivers crisp gear changes up to 7,500 RPM, while its slimmer aluminum case provides improved tunnel clearance for easier installation in classic and late-model conversions.
Features
- Rated for 600 lb-ft (813 Nm) torque capacity
- Compact aluminum case for improved fitment
- Smooth high-RPM shifting (up to 7,500 RPM)
- Hybrid carbon/bronze synchronizers
- Wider, stronger gears than previous TKO models
- Caged needle bearings for increased durability
- 26-spline input shaft
- 31-spline output shaft
- Mechanical and electronic speedometer compatible (application dependent)
Gear Ratios
| Gear | Ratio |
|---|---|
| 1st | 2.87:1 |
| 2nd | 1.89:1 |
| 3rd | 1.28:1 |
| 4th | 1.00:1 |
| 5th | 0.81:1 Overdrive |
Specifications
- Part Number: M-7003-TKX81
- Manufacturer: Ford Performance
- Transmission: Tremec TKX-600
- Input Shaft: 1.125″ × 26 spline
- Output Shaft: 31 spline
- Torque Rating: 600 lb-ft
- Case Material: Cast Aluminum
- Weight: Approx. 99 lb (45 kg)
- Fluid Capacity: 2.7 qt (2.6 L)
- Recommended Fluid: Tremec High Performance Manual Transmission Fluid or Mobil 1 Synthetic ATF
Recommended Bellhousings
- 302 / 351 Windsor: Ford Performance M-6392-R58
- 4.6L / 5.0L / 5.2L / 5.4L Modular: Ford Performance M-6392-M46
Condition Note
Additional Inspection Notes
- One external cast mounting tab is broken adjacent to the reverse light switch (refer to product photos).
- Shipping carton sustained freight damage during transport.
- Rear output shaft seal/dust cap area shows minor cosmetic marking from handling.
- Output shaft rotates freely by hand with no abnormal resistance.
- No visible cracks or fractures were found around the main case, rear extension housing, or seal bore other than the disclosed broken mounting tab.
- Input and output shafts appear straight with no obvious impact damage.
- Gear selector moves through all gear positions normally during manual inspection.
- Transmission is brand new, never installed, and never filled with oil.
- Sold exactly as photographed, with the disclosed freight damage reflected in the sale price.
Disclaimer: This transmission has been visually inspected only and has not been tested or installed. Please review all photos carefully to determine suitability for your application before purchasing.
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