You need to replace your clutch.
You can restart the transmission computer, on your 1996 Ford, by removing the transmission, computer fuse. Keep the fuse out for 10 seconds and replace it to its original slot.
check your cam positioning sensor
Good luck w this issue. We have the same problem. The BMW techs are not savvy on the smg. I am pulling the trany to replace the bad sensor my self.
if a 4 speed transmission locking torque converter may be stuck, unplug the wire at the transmission to check, could also be the crank shaft sensor
check your coil
restart your computer
Put shifter in park or neutral.
The PO1870 code is a transmission slip condition. This may be related to any number of transmission components, but can lead to major failure if left addressed. The condition of stalling is likely not related to PO1870 code, as a separate condition.
about 500 hours
IDK yup
It would die and not restart. Yes it may restart! I have had modules quit when they get hot and work again when they cooled down.
Bad fuel filter or maybe some water in the gas tank.