Lightning Strikes Again!
Pro-Series Transmission
The original Brinn transmission revolutionized circle track racing when it was introduced more than ten years ago. Now an entirely new Brinn Pro-Series transmission has been developed. This new transmission is as big a step forward in transmission technology as the original version was when it was introduced. In the new Pro-Series transmission the clutch has been moved to the input shaft.

The Pro-Series has been designed to fit anywhere that a first generation Brinn transmission fits and can be used with any Brinn or Chevrolet bellhousing.

The new generation Brinn Pro-Series transmission features the lowest rotating weight of any transmission, just 11 pounds. Even better, that weight is concentrated in an overall diameter of less than 2.75 inches which reduces inertia. The diameter of a weight is much more critical to overcoming inertia than the total weight itself. Effectively that means that it, and you, can accelerate and decelerate quicker. In high gear the only rotating components are the input and output shafts, the direct drive and reverse couplers and the clutch drive discs.

This revolutionary new concept in transmissions allows the greatest reliability ever. Since none of the gear train turns during operation there is little to fail. Lubrication is by the splash method and all gears have dog rings for easy shifting. The case is a hefty, well-ribbed magnesium unit that offers the maximum in strength and reliability. Best of all, the distance from the center of the main shaft to the bottom of the case is only 4.25 inches. This is the smallest dimension in the industry.

An important feature of the new Pro-Series transmissions is the integral hydraulic clutch. This unit, which includes the input shaft, clutch assembly and throwout bearing is simple and quick to install and remove. It mounts to the front of the transmission and can be quickly unbolted by removing only three bolts. Just one snap ring needs to be pulled for disassembly, meaning that clutch service and or replacement is easy.

Inside the clutch drum are 5 drive and 5 driven clutch plates. A needle bearing assembly ensures that the clutch drum is well supported and in alignment thus guaranteeing no drag and a positive clutch release.
Pro-Series Transmission Power Path
Low Gear

This Illustration shows the power path and gears that are used when the transmission is in low gear.
Direct Drive

This Illustration shows the minimal rotating mass in the high gear that is one of the real innovations of the Brinn Pro-Series Transmission.
The Brinn Pro-Series Transmission

70501 Pro-Series Transmission
The distance from the center of the shaft to the bottom of the case is only 4.25 inches. This is the most ground clearance in the industry.
The Brinn Pro-Series Transmission requires a traditional starter. A retrofit rear starter kit is available.
The Pro-Series Transmission is patented in the US and patent pending in Canada. Drive flanges and flywheels are not included with transmissions. Order the proper drive flange or flywheel to fit your application.