Split it open-Eat it out!
First off I'd like to thank my buddy Phong for coming over yesterday to help me install a new 4.10 third. For those that didn't know I had 3.91 gears w/and LSD in the rear and 4.10 in the front when I bought the truck. Life is much better now with the matching gears, I can use 4WD again. The install went fairly smooth except I wasn't able to reuse my axle shafts. For some reason after installing the 3rd member the backing plate and the flange on the axle housing wouldn't mate up. After a couple of minutes of scratching our head we tried the axle shafts from the donor axle and they worked fine. Now I can take my time buying 4.56 gears and getting those installed on the LSD equipped 3rd member and front diff.