I have a 99 379 with a 3406E in it that I want to do an engine swap on. The current 2WS engine has a 70 pin ECM. I have a good 5EK engine with the older 40 pin ECM and am trying to find out if there are any issues with this swap. I found an adapter harness from Mawk Industries but hate to put out the cash for it if there will be any other issues rearing their ugly heads. Anyone know?
3406E 2WS to 5EK ECM Adapter Harness
Discussion in 'Peterbilt Forum' started by oildriver, Jan 16, 2012.