Thrust block removal

Thanks again for the replies. I'd like to remove the thrust block as my first option, will consider the axle shortening if need be. I appreciate the advice. Does the carrier need to be removed to get at the block, or can it be done with the carrier in place? I couldn't find anything in the service manual, or online, to serve as a clear guide to even getting at the spider gears, and I'd like to do it right...