Just keep on working at it, not only are they torque heavy, that do allow mush room to apply the pressure you need. I was able to use a socket, swivel, 18" extension, and an impact gun. Worked okay but took forever to get steup. Helped immensely when my son crawled under there to help hold things in palce.

In the past I have dropped the tranny rear about five to six inches and suprisingly that made a major difference, however, that consumes twice as much time as fighting it with a long extension. You can reinstall it this way, just besure to get in started by hand before you put the impact on it.