96 ram 1500 output speed sensor

Does anyone know if the output speed sensor on the transmission could cause a delay in shifting from first to second?Also if it can wouldn't the engine light be on being it is a sensor?My truck is not shifting from first to second correctly.The engine light is not on.I've read the t.s.bs for these transmissions.I also read that Lucas additive will correct the problem.I've repaired a lot of problems on my truck from the plenum gasket to some wiring issues. but this transmission deal has got me walking around in circles and scratching my butt!


****Follow Up****
Ok I'm posting what i tried,I've heard people say it's a sticking plunger in the valve body,I went to Oreillys today and bought some stuff called TransTune made by Seafoam.I'll keep everyone that's having transmission problems up to date.These transmissions are not broke they just have some minor problems that can't seem to be diagnosed.(I didn't say they weren't junk though)