AW4? that's the automatic transmission. Do you mean the 242 transfer case? I believe the 231 from a 2.5 petrol has a 21 spline input, the 231 from a 4.0 petrol manual or 2.5 diesel is 23 spline as is the 242 on the 4.0 auto. This means your best source is from a TJ 4.0 or XJ diesel. There are no electrical issues but make sure you use the same size drive gear for the speed sensor tomaintain speedo accuracy, and get the plug for the range sensor of the donor vehicle if you can along with the shift lever gate, inkage and cosole bezel.