Note the front output shaft forward bearing race already installed in the case behind the front cover. We used a 11/4-inch socket to drive the rear bearing onto the front output shaft. You can see in the photo the order of things on the front shaft as they're installed inside the case. Don't forget the spacer between the forward bearing and gear. Once the gears and bearings are slid onto the output shaft inside the case, insert the rear bearing race and drive it in with a dead blow hammer until it's seated.