Arr now I ad this on my 93 auto - intermittent 'gearbox temp' warning. There's two sensors, one is down in front left engine bay in the autobox cooler line.
The other is stuck in the back of the transfer case, right behind the handbrake drum backplate. It's protected by a girt big rubber boot, with the wires coming out the back. Sadly the boot is so big it presses the wires against the brake backplate. Twenty years of vibration had worn the wire's PVC covering away giving an intermittent short. Handbrake on/off flexed the plate and made it come and go.
Impossible to get at without dismantling brake. One day .... Meantime cut a sheet of plastic material and wedge up between wires and backplate. It's been there three years so far ...
cheers, Ross K