American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COFO-S1EX

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Part Number: AWR-COFO-S1EX

$3,995.95

Transmission Combo, ProFit, Tremec TKX, 5-Speed, 2.87:1 First Gear, 0.68:1 Fifth Gear, Ford, Truck, Street Rod, Kit
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American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COFO-S1EX

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits COFO-S1EX

AWR-COFO-S1EX

Not Yet Reviewed

Part Number: AWR-COFO-S1EX

Estimated Ship Date: Mar 11, 2026

$3,995.95

Estimated Ship Date: Mar 11, 2026 Would you rather pick it up?

Overview

Brand:
Manufacturer's Part Number:
COFO-S1EX
Part Type:
Product Line:
Summit Racing Part Number:
AWR-COFO-S1EX
UPC:
41969292020
Transmission Included:
Yes
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:
0.68:1
Case Material:
Aluminum
Crossmember Included:
No
Transmission Mount Included:
Yes
Transmission Mount Type:
Polyurethane
Transmission Tunnel Patch Included:
No
Pilot Bushing Included:
Yes
Pilot Bushing Material:
Stainless steel
Pilot Bushing Type:
Roller
Speedometer Cable and Gear Included:
Yes
Backup Light Connector Harness Included:
Yes
Mounting Hardware Included:
Yes
Fabrication Required:
Yes
Quantity:
Sold as a kit.

American Powertrain ProFit Tremec TKX Manual Transmission and Installation Kits

American Powertrain ProFit Tremec TKX manual transmissions and installation kits put the power to the pavement with unmatched durability and versatility. Tremec has normally sourced their aftermarket transmissions from the OE side, such as the Magnum T-56 and the T-5, but this new design is made from the ground up as a strictly aftermarket transmission. Designed to fit classic muscle cars and customs, the TKX has a tighter, more streamlined case, and features 600 lbs.-ft. of torque capacity and are capable of engines speeds of 8,000 rpm with shifts at 7,500 rpm. The compact design provides clearance in most transmission tunnels without floor modifications, while case strength has increased from previous models with the new 3-piece aluminum housing and gaskets at all flanges simplifies installation and eliminates fluid leaks.

Additional features include:

* Designed with your specific vehicle application in mind
* Available with multiple gear ratio configurations for compatibility for multiple applications with three shifter locations
* Multi-cone synchronizers and synchronizer rings are made of sintered bronze and carbon for superior shifts
* All gears are supported by caged needle bearings to reduce end play
* Gears and shafts are made from ASTM 4615 grade steel and provide increased torque carrying capacity
* TKX manual transmissions have 31-spline output shafts for added strength, built-in reverse light switches, and cruise control safety switches
* The TKX also has separate GM and Ford case patterns and input configurations—with integrated GM and Ford transmission mount patterns
* Installation kits include a driveshaft slip yoke made from cryogenically hardened steel, a polyurethane transmission mount, a steel roller pilot bearing, and a reverse light wiring harness

Applications

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