Okay,
I have a 98 single cab with the 2.5l 4r44e trans (just a little guy)

So every time I start my truck, it starts out with the ABS light and the BRAKE light on. (the speedometer does not work btw) Once I start driving, it won't shift out of first until I put it in 2nd manually then to get out of 2nd I need to put it back in drive then from there on out it up and downshifts through all the gears (even O/D). But once it gets into 3rd gear and O/D the 'O/D off' lamp starts flashing.

I replaced my ABS Wheel Speed Sensor on the rear diff twice (plus the pigtail). I also replaced the speedometer just to make sure it was not the instrument cluster AND I found another RABS module to make sure it wasn't the computer.

I have seen schematics of the wiring on this truck and I traced 99% of the wires and haven't found any breaks.

I'm running out of options here.. please help!!!

 

If your O/D Light is flashing, that means you're throwing a transmission-related code (similar to the Check Engine Light, just for the trans).

Get the codes read at AutoZone or somewhere like that, and see what it says. That'll give you a better idea of what's going on.

 

I do need to do that.
I've read on many articles that it has to do with that ABS sensor.

I'll have to get the code read. My only concern is that with my luck it's going to be something underlying the OBD codes