Here is a bulletproof 500+ft lbs transaxle with great potential, but rather expensive.
EMCO designed the GA46 Transaxle expressly for the Daytona Prototype classification and for competition in 24-hour endurance racing. The GA46 first proved its reliability by flawlessly completing a 28-hour test at Daytona on November 6-7, 2002. Subsequently, the GA46 has run successfully in all the races of the 2003 Grand-Am Rolex Sportscar Series, including the Rolex 24 Hours of Daytona where it helped Multimatic capture the Daytona Prototype class victory.
By November 1st, 2003 the GA46 was in 9 of the 10 cars (3 of 4 manufacturers) competing in the final race of the Rolex Series including the Team Champion Bell Motorsports No. 54 Chevrolet Doran JE4 with its Driver Champion Terry Borcheller.
February 1st, 2004: The Rolex 24 Hours of Daytona overall race winner Bell Motorsports No. 54 Pontiac Doran JE4 shifted the GA46 to victory logging over 1800 race miles and over 12,500 shifts! All eleven Daytona Prototype GA46 customers competing in this grueling race combined for more than 13,000 trouble free miles over the course of the race.
GA46 - EMCO Gears, Inc.