The Syracuse N-Series Extension:
A New Standard in Manual Transmission Design
The original GM Muncie four-speed defined an era of American performance. Auto Gear has continued to engineer
beyond that original design, and the N-Series reflects that continued evolution — built in Syracuse, where the manual transmission began.
As part of the N-Series system, the new N-Series Extension introduces a revised housing designed to support additional features and provide clear Syracuse brand identification, while fitting the same applications builders expect.
The N-Series Extension is now in production.
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N-Series Extension Features
The N-Series Extension includes the following features:
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Increased Strength
A revised casting design provides additional rigidity and durability. -
Left-Hand Speedometer Support
Supports left-hand speedometer drive configurations for applicable installations. -
Optional Cylindrical Roller Bearing Output
Available for applications where a roller bearing output is specified. -
Relocated Breather Port
For oil-seal maindrive applications, the breather port location improves tunnel clearance and accessibility. -
Screw-Retained Reverse Shift Lever
The reverse shift lever is retained by a removable screw rather than a taper pin, simplifying service in competition environments.
Syracuse Engineering
The N-Series Extension is part of a broader effort to establish a distinct Syracuse identity — not as a reinterpretation of the original design, but as a continuation of ongoing engineering development.
The result is a gearbox that fits where expected, installs as expected, and is instantly recognizable as a Syracuse product.
Built in Syracuse
The N-Series Extension completes the N-Series system — a modern manual transmission platform engineered, machined, and produced in Syracuse.
Spec Your N-Series Build
The N-Series Extension is designed to integrate into complete transmission builds.
Use our EZ-Spec form to define your application and ensure the correct configuration.
