Product Summary

TKO, TKX, 5-Speed Transmission Speeds

  • Wide ratio gearing ideal for street performance and versatile driving
  • 600 lb-ft torque capacity with smooth shifts up to 7,500+ RPM
  • Compact, end-loaded design fits most tunnels with minimal modification
  • Three selectable shifter locations for maximum fitment flexibility
  • Multi-cone synchronizers with hybrid bronze/carbon rings for superior shift quality
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Key Specs

MFG. Part #TCET18086
BrandTREMEC
Transmission Speeds5-Speed
Input Shaft Spline Count10
Input Shaft Diameter1.125"
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Need To Know

Quick and Easy Returns

Return Policy

TREMEC TCET18086 Details

The all-new TREMEC TKX 5-speed manual transmission is purpose-built for the aftermarket, delivering modern performance, compact packaging, and exceptional durability for Ford applications. The TCET18086 TKX Wide Ratio is designed to fit a wide range of classic and custom builds with little to no floor pan modification, making it an ideal upgrade for restorations, restomods, and performance street machines.

Engineered with a compact, end-loaded design, the TKX provides maximum installation flexibility while offering outstanding high-RPM shift capability. Featuring multi-cone synchronizers and hybrid carbon/bronze synchro rings, it delivers smooth, precise shifts at speeds up to 7,500 RPM—perfect for today’s high-performance engines.

Built for strength and longevity, the TKX features a rigid 3-piece aluminum housing, optimized gear geometry for reduced stress, and premium internal components designed to handle up to 600 lb-ft of torque. The result is a transmission that combines durability, drivability, and modern refinement in a compact package.

  • Wide ratio gearing ideal for street performance and versatile driving
  • 600 lb-ft torque capacity with smooth shifts up to 7,500+ RPM
  • Compact, end-loaded design fits most tunnels with minimal modification
  • Three selectable shifter locations for maximum fitment flexibility
  • Multi-cone synchronizers with hybrid bronze/carbon rings for superior shift quality
  • High-strength 3-piece aluminum case for increased rigidity and durability
  • Short-throw billet shifter with crisp engagement and reduced noise
  • Ford bolt pattern and mount configuration for compatibility
  • 10-spline input / 31-spline output shaft for added strength
  • Built-in reverse light and cruise safety switches

Gear Ratios:

3.27 | 1.98 | 1.34 | 1.00 | 0.72 (Rev 3.00)

Warranty Information

For any warranty issues with TREMEC transmissions, please contact TREMEC directly. TREMEC provides a Product Support Form to be filled out and submitted to them, after which TREMEC will contact you directly to complete the warranty process.

TREMEC Transmission Limited Warranty (PDF)

TREMEC Product Support Form (Link to TREMEC's Website)

Speedway Motors cannot facilitate the return of defective Tremec products as they have requested to handle these directly with the consumer. For defective product support and Return Authorization, please contact Tremec at +1 (800) 401-9866 (USA) or by ema

TREMEC TCET18086 Specifications

KEY SPECS
MFG. Part #TCET18086
BrandTREMEC
Transmission Speeds5-Speed
Input Shaft Spline Count10
Input Shaft Diameter1.125"
GENERAL
Torque600 ft./lbs.
Output Shaft Spline Diameter1.375"
Output Shaft Spline Count31
Case MaterialAluminum
First Gear Ratio3.27:1
Gear Ratio (2nd)1.98:1
Gear Ratio (3rd)1.34:1
Gear Ratio (4th)1.00:1
Gear Ratio (5th)0.72:1
Bellhousing IncludedNo
Yoke IncludedNo
GTIN Code041969292020
Shifter IncludedNo
Gear Ratio (Reverse)2.56:1
Sold in QuantityEach
Yoke StyleSlip On
Shifter StyleLinkage operated

Ratings & Reviews

5

3 Reviews

Overall Assessment

Customers are delighted with the quality and durability of our product, noting its perfect fit in vehicles like the Mustang. Its reliability stands out, with users remarking on its robustness. They appreciate the ease of assembly, emphasizing on the minimal issues encountered. The product's size is another admired feature, a perfect match for those who value compact and sturdy design. The product's availability and fast delivery via Speedwaymotors comfortably outweighs experiences with other providers.

5

3 reviews

5

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Easy to do

5.0

4 years ago

The Rog

Kearney, NE

Verified

We put it in a Mustang with a 351C. It went together with very few issues

Would Recommend

Best service ever

5.0

4 years ago

DRB

St Louis Mo

Verified

Bought this to go in a 68 mustang just can't beat its size and durability

Would Recommend

Very happy with purchase.

5.0

5 years ago

John

Nebraska

Verified

Waiting for 4months from another seller. Saw Speedwaymotors had it in stock, canceled other order and placed order. Showed up next business day!

Would Recommend

Showing 3 of 3 reviews

Questions & Answers

2 Questions • 2 Answers

Does it come with different gear ratios? I think the 3. Something is to low .

by Sporty1203

• 2 years ago

1 answer

Is this compatible with a Ford FE 390 engine what is the correct Quick time or other part mfg bell housing Part Number

by Roscoe

• 2 years ago

1 answer

2 of 2 questions shown

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