Fox Body Hydramax TKX vs TKO OBS TR-4050 2WD 5th Gen Camaro Magnum XL Kit STS SWAG Save The Stick Shift Knobs Transmission Fluid Service Packages Transmission Seal & Install Tool American Powertrain ProTwin Clutch GEARSTAR RAM-4050-Kit STS Contest Wilwood Brakes Currie Slider S10-Kits Pro-Twin-Sale TKX Free Shipping Baconshift 2025 Slide Black Friday Merch American Powertrain Engines Memorial Day Sale

First Column Content

First Column Content

Second Column Content

First Column Content

Second Column Content

Third Column Content

First Column Content

Second Column Content

Third Column Content

Fourth Column Content

FULL WIDTH TEXT COMPONENT

All Products Component

Differentials
+
Transmission Kits
+
Services
+
Fluids
+

Products by Manufacturer Component

Brake Kits
+
Differentials
+
Transmission Kits
+
Fluids
+
Transmissions
+
Hydraulic Clutch Kits
+
Clutches
+
Bell housings and adapters
+
Cross members
+
Accessories
+
Crate Engines
+
Flywheels
+
Electric Power Steering
+
Pedals
+
Shifters
+

All Body Types Component

Ford F100/F150
+
GM Tri-Five
+
Mopar A Body
+
Chevy Corvette
+

News Section Component

American Powertrain™ Introduces Pro Fit TKX 5-Speed and Magnum 6-Speed 2WD Conversion Kits for 1999-06 Chevy/GMC NBS GMT800 Trucks

Now in stock. Designed to keep the stock appearance with precision fit. COOKEVILLE, TN (March 25, 2026) – American Powertrain™, a leading source for modern overdrive systems,...

Read More

Read More
2026 American Powertrain Event Schedule

American Powertrain is hitting the road again soon and coming to an event near you including some fresh additions to our schedule to mix it...

Read More

Read More
Gear Rollover Noise

How to Reduce Tremec Transmission Gear Rollover Noise: A Technical Guide For enthusiasts running Tremec manual transmissions—TKX, Magnum, Magnum XL, and TR-series units—gear rollover noise...

Read More

Read More

Video Section Component

Play Video
Test

Test

Play Video
Test

Test

Play Video
Test

Test