So I figured out how to read the codes w/out obd1 scanner with a paper clip hack. It gives me (3×12) and (3×45). 45 being the o2 sensor..?Pull codes. Sounds like OD has blown a sprag in the transmission and you get only 3 gears and no TCC lockup. Your trans temps will be extreme with an unlocked TC risking more damage and fire.
Yea it's gas automaticManually shift the gears and count the shifts. You should have 4 and be careful not to count a TCC lockup in 3rd. A misadjusted shift pointer can have you selecting 3rd (direct) by mistake.
In some cases TCC lockup can be locked out if the engine is misfiring or not running well.
We working on a gas rig?
Bluntly an assumption. Shifting the 4X4 transfer case and then grinding noises sounds like a transfer case problem. Transfer case not in gear or shift fork worn out in it. Hint: when shit's grinding and going "Bang Bang Bang!" on the parking pawl: SHUT ENGINE OFF IN NEUTRAL! Wait for spinning stuff to stop spinning then and only then can you shift to park. This way you don't grind up gears or snap the parking pawl clean off. It is a bit of an art to shift from 4X4 low to 2WD or 4X4 high. Screw it up and your only choice is to shut the engine off in neutral as neutral has enough internal drag to spin the output shaft of the transmission up. You may have to roll very very slowly some to shift the transfer case.so yea definitely something with the transmission.