23 Dec 11, 09:15 pm
Upper for adjusting. Lower for moving forward. That's the general rule I've used in the past. But both can adjust both. I would personally do both. How far off are you? Why are you far off? If you starting rotating the axle you'll change the relationship between it and the t-case. Which is more important to me. Also all you other brackets are going to move as well. Which means if you have to move it far you are going to have to cut it all off and do it again. Weigh all options and the results of each before doing anything.