Description
About This Transmission
Few automatic transmissions have earned the reputation and longevity of the GM Powerglide. Originally introduced by General Motors decades ago, the Powerglide quickly became a favorite among drag racers due to its simple design, lightweight construction, and exceptional durability under extreme horsepower levels.
Today, the Powerglide remains one of the most widely used racing transmissions in professional and sportsman drag racing. Its two-speed design minimizes shifting complexity while maximizing consistency, making it a preferred choice for racers seeking predictable elapsed times and dependable performance.
The TCI Powerglide 73250431 takes the proven Powerglide platform and enhances it with modern racing components, advanced safety features, and competition-grade construction.
For racers building serious drag strip vehicles, this transmission provides the performance and durability required for demanding competition.
Compatible Applications
This transmission is designed for rear-wheel-drive Chevrolet racing applications.
Common applications include:
- Chevrolet Small Block Gen I Engines
- Chevrolet Big Block Mark IV Engines
- Drag Racing Vehicles
- Bracket Racing Cars
- Door Cars
- Dragsters
- Pro Tree Racing Applications
- High-Performance Race Builds
Compatible vehicle ranges include:
Chevrolet Small Block Applications
- 1962-1972 Chevrolet V8 Applications
- Chevy Small Block Gen I Platforms
Chevrolet Big Block Applications
- 1966-1972 Chevrolet V8 Applications
- Chevy Big Block Mark IV Platforms
Compatibility should always be verified before purchase.
Built Specifically for Drag Racing
Unlike street-oriented automatic transmissions, this Powerglide is designed specifically for racing environments.
Key racing features include:
- Full Manual Valve Body
- Reverse Shift Pattern
- Integrated Trans Brake
- Racing Tailshaft Configuration
- Competition-Grade Internal Components
- SFI-Certified Safety Protection
These features help maximize launch consistency and transmission durability under extreme racing conditions.
Full Manual Reverse Pattern Valve Body
The transmission features a full manual valve body with reverse shift pattern operation.
Benefits include:
- Precise gear selection
- Improved driver control
- Consistent shift timing
- Reduced automatic shift variables
- Better racing performance
This configuration is commonly preferred in competitive drag racing environments where precise control is essential.
Integrated Trans Brake System
The included trans brake system is a critical component for competitive drag racing.
Advantages include:
- Consistent launch RPM
- Improved reaction times
- Better starting line control
- Repeatable launch performance
- Enhanced race consistency
For racers competing in bracket racing and heads-up classes, a quality trans brake can significantly improve performance consistency.
Dedenbear Case with SFI Certification
Safety is a major consideration in high-performance motorsports.
This transmission features a Dedenbear case equipped with:
- Integrated Safety Liner
- SFI 30.1 Certification
- SFI 4.1 Certification
- Built-In Transmission Shield
- Built-In Flexplate Shield
These safety features help meet racing organization requirements while providing additional protection during competition.
Heavy-Duty Racing Components
The TCI 73250431 incorporates numerous performance upgrades designed to withstand demanding racing environments.
Notable components include:
- Vasco Input Shaft
- Steel Clutch Hub
- Aluminum Deep Transmission Pan
- Aluminum Transmission Case
- Heavy-Duty Internal Components
- Racing-Grade Construction
These upgrades contribute to long-term reliability and durability.
Why Racers Choose Powerglide Transmissions
Despite having only two forward gears, the Powerglide remains one of the most successful racing transmissions ever built.
Advantages include:
- Reduced rotating mass
- Exceptional durability
- Simplified shifting
- Consistent elapsed times
- Proven racing history
- Excellent high-horsepower capability
For many racers, consistency wins races, and few transmissions offer the repeatability of a properly built Powerglide.
Technical Specifications
This remanufactured transmission is built for dedicated racing applications.
Key specifications include:
- Manufacturer: TCI Auto
- Model Number: 73250431
- Product Line: TCI Powerglide Transmissions
- Condition: Remanufactured
- Number of Gears: 2
- Transmission Type: Automatic
- Shift Pattern: Reverse
- Valve Body: Full Manual
- Bellhousing Pattern: Chevrolet
- First Gear Ratio: 1.80:1
- Input Spline Count: 17
- Input Shaft Material: Vasco
- Clutch Hub Material: Steel
- Tailshaft Length: 11.250 Inches
- Yoke Style: Slip-On
- Transmission Pan: Deep Aluminum
- Transmission Case: Aluminum
- Case Finish: Natural
- Fluid Fill Location: Case
- Trans Brake Included: Yes
- Lockup Compatible: No
- Torque Converter Included: No
- Flexplate Included: No
- Transmission Controller Included: No
- Wiring Harness Included: No
- Transmission Cooler Included: No
- Dipstick Included: No
- SFI Certification: 4.1 and 30.1
- Dedenbear Safety Case Included
Purchasing Confidence and Support
Selecting the correct racing transmission is critical to overall vehicle performance.
Before ordering, buyers should verify:
- Engine compatibility
- Bellhousing requirements
- Racing class regulations
- Drivetrain configuration
- Vehicle build specifications
Our team is available to assist with compatibility questions and performance recommendations.
Customers may also wish to explore our Powerglide transmissions, racing transmissions, drag racing drivetrain components, and Chevrolet performance transmission collections.
Frequently Asked Questions
Is this transmission intended for street use?
This transmission is designed primarily for drag racing and high-performance competition applications.
What makes a Powerglide popular in drag racing?
The Powerglide’s simple two-speed design provides exceptional durability, consistency, and reliability under high horsepower conditions.
Does this transmission include a trans brake?
Yes. The TCI 73250431 includes an integrated trans brake system.
What type of valve body does it use?
This transmission utilizes a full manual reverse-pattern valve body.
What safety certifications does this transmission carry?
The transmission is certified to SFI 4.1 and SFI 30.1 standards.
Is the torque converter included?
No. The torque converter is sold separately.
What engines is this transmission compatible with?
The transmission is designed for Chevrolet Small Block Gen I and Chevrolet Big Block Mark IV rear-wheel-drive applications.
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