Help picking correct ECU!
Any EFI-SD48B hardware will work. LAW0 is the computer for that calibration code.
Other EFI-SD48B differences would be fueling for different altitudes, possibly torque differences depending on axle ratios.
If you want exact replacement, you must get a *-TA or LAW#.
Here is a thread with same calibration code as yours:
E4OD shifting too early, Code 633 present in 2WD truck... - Ford Truck Enthusiasts Forums (ford-trucks.com)







