27% overdrive 4th gear – This tall overdrive gear gave it great highway mileage for the time while maintaining performance.Removable bellhousing – Has a removable bellhousing like most automatics, allowing for easier installation and transmission work.Only operates when engine conditions allow it to lock. Lock-up torque converter – Locks up in 4th gear to improve fuel economy.TV cable – Uses a TV (throttle valve) cable to control line pressure based on throttle position.Exceptions existed, but it’s a good starting point. 16-bolt pan – Most 700R4 transmissions came with a 16-bolt pan from the factory.Input and output shafts – The input shaft has 30 splines while the output shaft has 27 splines.This combo gave great acceleration and fuel economy. Gear ratios – First gear ratio is 3.06:1, second is 1.63:1, third is 1:1, and fourth is 0.70:1.Length and weight – Coming in at 23.4 inches long and weighing 155 lbs, she’s not petite but not a heavyweight either.It’s made of cast aluminum – The 700R4 uses cast aluminum for the case and components making it light and strong. The 700R4 came before the 4L60 and they share some parts.
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