Hi, I was wondering if anyone knew what type of computer should be controlling an early 90's BTR 4 speed. The gearbox was fitted into an NA Fairlane, along with a 4.0 six before I got the car. Before I got it, it was having all sorts of gearbox issues, such as shifting at inappropriate times, torque converter locking/unlocking and entering LHM. any help/suggestions would be much appreciated. Thanks.