In case anyone is interested, here are the maximum torque ratings for the A5 and A8 transmissions: 845RE (3.6) 450 N-m (332 lb-ft) 8HP70 (5.7/6.4) 700 N-m (516 lb-ft) NAG1, W5A580 (5.7/6.1) is almost 600 lb-ft. 8HP90 (6.2 Hellcat) 900 N-m (664 lb-ft)