Hi, I own a 1999 Ford Explorer Sport - 4wd 4L SOHC - Automatic Transmission At 25mph / 3000 rpm, when Explorer attempts to shift, the engine revs and the rpms will jump to 4500 / 5000 rpm, until I let off the gas, then it will shift into 2nd gear (or 3rd?). However, if I accelerate very slowly, the engine will rev slightly at 25mph (3500 rpms) but eventually shift on its own (without me letting off the gas). Also, this is the only gear that has the problems, shifting between all other gears works great!! The Ford Service center says that the transmission is not holding the pressure to shift properly at this gear. They suggest replacing the transmission. (But this is expensive). I tried adding the Lucas Transmission treatment, but it is still doing the same thing. I have two questions for anyone that would be kind enough to offer some advice: Does anyone know of a sensor that might cause this kind of problem? If I unhook the wires to the Torque Converter, will it fix this problem (even if it is temporarily)? And if so, how do I unhook the wires to the Torque Converter? Thanks for the help.