Broke the Blazer out of storage to start working on her again after my life has settled down a bit. She was fine when I put her into storage but no she is mad. The 203 case has output on the front shaft but nothing on the rear. It dirves only in front wheel drive. I installed a set of 1 ton running gear under her with warn hubs upfront but when I unlock the hubs nothing moves and the front shaft spins. No matter the shift location. The T-case has never been opened and no partime kit was ever installed in it. I think I will just do a 205 swap for the moment and then look into the doubler since I will have both a 203 and 205, but what could be the problem with the 203?