So today I am going to be teaching you how to have a diesel on the back of steam railtours. Let's get started. Step 1: Make a scenario on a route of ur choice. Step 2: Have one Steam Train service and one diesel service (again of ur choice). Step 3: Have the whole consist pass a signal then wait for the diesel to arrive. Step 4: Reverse and couple up to the diesel. The routes I recommend practicing this on is NTP & TVL. If this tutorial helps leave a like or a comment.