What I found to be different about it compared to the Gouges, is there were less machine type problems, and more problems which required you to use theory to estimate what WOULD happen IF... ect. There were 2-3 Spring questions on mine, so make sure you go over those. Lots of pulley related questions, as well as gears rotation/mechanical advantage of gearing. Also, there was one question about static friction (ie, you have a 20lb object being pushed by 10lb of force, what does the static friction coefficient have to be below to move the object.)
Really make sure you understand why the machines are working and not so much about the equations if that makes sense. From what I can remember, I had zero electrical questions, but others have before me. The new ASTB-E study guides fixed mechanical section really helped me prepare (Make sure you get the second edition, it may not be out yet, but email Accepted Inc. prior to ordering.) The Mechanical Section in other words just makes sense if you look at the problems and analyze whats going on. Give yourself the time as I believe correct answers > # of answers scored.
Again, I haven't taken a math class in 3-4 years, maxed out at Algebra II in high school, then did a brief stats class in community college. In addition, I never took a physics class. So I really had to reteach myself the math and learn basic physics within about a week and a half. Best of luck.