I am in the process of converting my 88 MJ from a manual (BA10/5) to an automatic trans (AW4). I removed all the parts from a donor 89 XJ that I owned. My questions are the following:
1. I am replacing the wiring harness to accommodate the TCM. Do I have to install the ECM from the donor or can I use the one currently in my MJ?
2. If I have to replace the ECM, the donor vehicle had ABS, will that affect my swap at all?
Any help is certainly appreciated.