Brinn Transmission Kit for 1 Piece Rear Main Seal

The Brinn Transmission Kit for 1-Piece Rear Main Seal is a complete lightweight racing transmission package designed specifically for 1986-up Small Block Chevrolet (1-piece rear main seal) engines. Engineered for competitive oval track and dirt track racing, this kit combines Brinn’s proven 2-speed racing transmission with the essential installation components required for a professional drivetrain setup. Designed to reduce rotating mass while maximizing durability, the Brinn transmission features a lightweight aluminum case, cryogenically treated gears and shafts, and an advanced internal dog-clutch design that delivers quick, precise shifts under demanding racing conditions. By eliminating the need for a conventional clutch assembly and throwout bearing, the transmission improves throttle response, reduces drivetrain weight, and minimizes maintenance. The included heavy-duty steel bellhousing is compatible with both Small Block Chevrolet (SBC) and Small Block Ford (SBF) engine bolt patterns. Precision laser-cut and CNC-machined construction ensures excellent alignment and durability while adapting engines to Muncie and Saginaw transmission bolt patterns, including Brinn, Bert, Falcon, and similar racing transmissions. Whether you’re building a Wissota Modified, IMCA Modified, Sport Mod, Hobby Stock, or other circle track race car, this complete transmission kit provides reliable performance, easy installation, and race-proven durability. Features Complete Brinn Racing Transmission Installation Kit Fits 1986-up Small Block Chevrolet engines with 1-piece rear main seal Lightweight aluminum 2-speed racing transmission Rated for up to 600 lb-ft of torque Internal dog-clutch design for fast, positive shifts Cryogenically treated gears and shafts for maximum durability Eliminates conventional clutch and throwout bearing assembly Heavy-duty steel bellhousing included Fits both SBC and SBF engine bolt patterns Compatible with Muncie and Saginaw transmission patterns Laser-cut CNC-machined bellhousing Bottom inspection opening for easy maintenance Designed exclusively for competition use Specifications Brand: Brinn Manufacturer Part Number: 91606161 Transmission Type: Racing Manual Number of Speeds: 2 Torque Capacity: 600 lb-ft Case Material: Aluminum Input Shaft: 10-Spline Input Shaft Diameter: 1.0625″ Output Shaft: 27-Spline Output Shaft Diameter: 1.375″ Low Gear Ratio: 1.88:1 High Gear Ratio: 1.00:1 Reverse Gear Ratio: 2.29:1 Shifter Style: Linkage Operated Yoke Style: Slip-On Bellhousing Included: Yes Shifter Included: No Yoke Included: No Kit Includes Brinn 2-Speed Racing Transmission Steel Bellhousing Bellhousing Bolt Kit Steel Drive Flange for 1-Piece Rear Main Seal ARP Crankshaft Bolts 60-Inch Brake Line Straight AN Adapter Fitting Performance Transmission Fluid Transmission Storage Stand Installation Hardware Recommended Applications Designed for race vehicles equipped with 1986-up Small Block Chevrolet engines featuring a 1-piece rear main seal , including: IMCA Modified Wissota Modified Midwest Modified Sport Mod Hobby Stock Dirt Modified Stock Car Circle Track Race Cars Oval Track Competition Vehicles This transmission is intended for competition use only and is not designed for street-driven vehicles. Installation Requirements Depending on your race car setup, installation may require: Compatible racing driveshaft Slip yoke Racing shifter linkage Transmission mount Approved transmission fluid Proper engine and driveline alignment Professional installation is recommended to ensure maximum performance and reliability. Warranty The Brinn Transmission Kit for 1-Piece Rear Main Seal is backed by a 3-Year Limited Warranty , covering defects in materials and workmanship under normal competition use when properly installed and maintained.