It's an RE but it's a 46. The 42 is a 904/ A500 that is a 727/ A518
Here are some good photos of the two I swiped off the www. One is the smaller 904 based/ A500, the other is the larger 727 based A518 "42, 44" 4 means 4 speed, the 2, 4, 6 7 is torque level, R is Rear wheel drive, and H is hydraulic, E is electronic