we have been working on these for a year now and they are just about ready. they were designed and built for high hp marine applications. not based off a powerglide like the other two speeds.
they bolt directly in place of a bam or huber to your bell housing, they have a much larger piston then the bam or huber to push on the clutches and more clutch plates with more line pressure.
low gear is 1.5 to 1 for ease of docking and getting on plane.
they are rated for 2500 hp with a one year warranty.
they have a bolt on flange for the back so they will work with the different size u-joint flanges.