The TorqShift is a five-speed, rear-wheel-drive unit that actually has six forward speeds with ratios depending on whether the transmission is operating in hot or cold mode.. The ratio for 1st gear was changed from 2.71 to 3.09. For 2nd gear the overdrive clutch is applied to provide a ratio of 2.20. 3rd gear provides a ratio of 1.54, the same as the 4R100’s second gear. All sound familiar? In cold mode (below -15°C (5°F), determined by the transmission-fluid-temperature sensor), the overdrive clutch is engaged in 3rd gear to provide a ratio of 1.09 for 4th gear, and the transmission will shift directly from 4th to 6th gear (overdrive), which has a ratio of 0.71. In hot mode the transmission will shift 1st, 2nd, 3rd, 5th (ratio 1.00), 6th.