Sonnax T35-GMFD-01K – 1350 Series 3-Bolt Dual-Pattern Aluminum Adapter Flange Yoke Kit
The Sonnax T35-GMFD-01K is a high-performance aluminum adapter flange yoke kit designed to convert factory-style two-piece driveshaft assemblies into stronger, more durable one-piece driveline configurations. Manufactured from high-strength 6061-T6 aluminum, this precision-machined adapter provides a reliable connection between compatible transmission or differential flanges and a conventional 1350 series U-joint.
Featuring dual 96mm and 110mm bolt circle patterns, this versatile adapter accommodates a wide range of GM and Ford performance transmissions. It eliminates factory-style rubber flex discs (giubos) and/or CV joints when used in a properly designed driveshaft conversion, making it an excellent choice for street performance, drag racing, custom drivetrain swaps, and high-horsepower applications.
Product Specifications
| Specification | Details |
|---|---|
| Manufacturer | Sonnax |
| Manufacturer Part Number | T35-GMFD-01K |
| Material | 6061-T6 Aluminum |
| U-Joint Series | 1350 |
| Bolt Count | 3 |
| Bolt Circle Diameters | 96mm & 110mm |
| Bolt Hole Diameter | 0.500" |
| Flange Outside Diameter | 5.450" |
| Pilot Diameter | 0.631" |
| Pilot Type | F (Female) |
| Flange Face to U-Joint Centerline | 3.000" |
| Weight | 1.980 lbs |
| Design | Dual-Pattern Adapter Flange Yoke |
Transmission Applications
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GM 6L80 Automatic
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GM 6L90 Automatic
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GM 8L90 Automatic
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GM 10L80 Automatic
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Tremec TR6060 Manual
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Tremec TR3160 Manual
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Ford Mustang MT-82 Manual (2018–2022)
Vehicle & Differential Applications
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Pontiac GTO (2004) – 96mm Bolt Circle, Differential Side
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Pontiac GTO (2005–2006) – 110mm Bolt Circle, Differential Side
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Custom Street Rod and Hot Rod Applications
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Performance Drivetrain Conversions
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Compatible Engine and Transmission Swaps
Features & Benefits
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High-strength 6061-T6 aluminum construction
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Compatible with 1350 series U-joints
-
Dual 96mm and 110mm bolt circle mounting patterns
-
Precision-machined for accurate fitment and balance
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Allows conversion from factory-style two-piece driveshafts to one-piece driveline configurations
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Eliminates rubber flex discs and/or CV joints in compatible conversions
-
Helps improve driveline strength and durability
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Reduces maintenance associated with factory-style driveline connections
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Ideal for high-performance street, drag racing, and custom applications
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Versatile design for multiple transmission and differential flange configurations
Kit Includes
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(1) Sonnax 3-Bolt Dual-Pattern Aluminum Adapter Flange Yoke
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(1) Spacer for GM 8L90 and 10L80 Applications
Important Fitment Information
Verify transmission or differential flange bolt circle diameter, bolt hole diameter, pilot diameter, and U-joint series before ordering.
Important: This adapter features both 96mm and 110mm bolt circle patterns. The correct bolt pattern and pilot fit must be confirmed before installation.
The included spacer is specifically intended for GM 8L90 and 10L80 transmission applications. Refer to the manufacturer's installation instructions for proper spacer usage.
This adapter is designed for 1350 series U-joints. A complete one-piece driveshaft conversion may require additional components, including the appropriate tubing, weld yokes, slip assembly, and U-joints.
Custom applications may be possible when all mounting dimensions are compatible. Always verify measurements and driveline configuration before purchasing.