I can't give any numbers, but I know the Muncie (SM465) will stomp all over just about anything else except more recent truck transmissions, and the T10 was used in Corvettes equipped with 300+ HP small blocks, as well as 400+ HP big blocks if I'm not mistaken. The AX-15 may be durable in our 200 HP MJ's and XJ's, but I think I can safely say the other two were put behind engines, from the factory, with twice that much output. Also, the SM465 and T10 are suitable for two very different applications - don't expect the T10 to hold up to being driven like a dump truck, and don't expect to the SM to like speed-shifting.