Thanks for the quick response. The short answer to your question is "I don't know and can only guess". The previous owner said that he had 4x4 problems around 40k and the dealership screwed around for quite a while before putting in a new axle to satisfy his warrenty. The dealership has since changed hands and all of this happened 8 to 10 years ago so.... The truck now has 200k on it and I still wouldn't know about the axle if I hadn't decided to repack the fronts before another winter in NM, AZ, CA (summers are in WI). By the way, when you say that the D28 wasn't strong enoungh, I assume that you mean when off-roading. Looks like I'll be hunting for a 35 with the right ratio.