TC is locking up, OD is not engaging.

 

gotcha, thought they were the same. what does overdrive actually do then?

 

It's a higher gear, like a 4th gear, controlled by that button on your dash.

 

It's one more gear. It has a higher ratio to lower rpms at highway speeds to conserve fuel, etc.

 

so i guess its an electrical problem. btw my air box was off (thought it was clamped down to the TB) and i was able to go over 2500rpm in gear. wierd?

 

If everything is stock you should be hitting 3rd around 25 to 30mph and 1st to 2nd, 15 to 20 mph. Driving like grandpa, anyway. Have you inspected TV cable is secure and nothing broke or binding up? And adjusted right?

 

tv cable is good. i shift out of first at like 20 light driving.

 

I know when I had transmission issues in my 96 it did indeed give me multiple codes but no check engine light.... when I asked about it I was told the "check engine" light is just that. Check engine not transmission or drivetrain. It makes sense if you think about it. since if it was for all codes it would say "check computer" or "drivetrain"....
connect a code reader to it and I bet you'll see codes...
others hear will argue you should see the light but I didnt... now the "OD off" button should be coming on automatically when the OD malfunctions or the transmission overheats.

also if you bought it this way,
make sure the right transmission is installed...it sounds funny I know but previous owners have been known to take some crazy shortcuts to sell their truck.

 

the tranny is orginal... the family that had it before me did no changing except a new 3.55 diff... how do i read it with a code reader if it is '95? OD off light only comes on if i press it

 

Far be it from me to lend a hand - but you don't by chance have anything else occurring like the rpms constantly surging do you? I had that and from searching here decided to put in a new throttle position sensor. It began to act properly after a few blocks.