Is the motor out of your truck that you are trying to remove the front shaft from ? I just junked out a 87 auto tranny truck and had a hell of a time getting the shaft out ! then I realized that the tranny and transfer case hanging down was putting the universals in a pinch so I couldn't get on them with a socket ! I jacked the tranny up and then I could get the impact wrench on the with a wrench on the back side ! but either way theirs not much room in their ! I also seen in my chiltons where they were using one of those bent wrenches , but I diddn't have any of those .