So I dont have overdrive...but here is all the things I do have to help diagnose the issue. I have the following: Full transmition fluid, the relay next to the glove box IS clicking when I press the overdrive button on the shifter, the shift light is turning off/on when I press the previously mentio...

Ok, it looks like the cable you are referring to is the lower of the 2 cables. The upper cable appears to be the accelerator cable. Yes, both cables seem to be working very freely. I wasnt able to check on the transmission on the other end of the cable to see what was moving/supposed to be moving.