I did a search on this a while back and came up with good info. I had both a D44 and a 10 bolt to use in the front of my builder and I was wondering which was better for budget and strength. I found a poll, and like 80 percent said the 10 bolt was the way to go because there was little if any strength difference between a D44 and a 10 bolt. They both have 8.5 ring gears, and 10 bolt is 28 spline vs. 30 splines on a 44. Not just that, 10 bolt axles are still dime a dozen but 44 stuff isn't nearly as common. I never even considered using a D60 because of budget, and if you haven't priced one you should. I asked my local junkyard how much they get for different axles and a 10 bolt or 44 is $175 complete, and a D60 is $1200(!!) IF you can even find one. If you are rich buy as much strength as you can get, if you are like me stick with smaller cheaper stuff and bare in mind it is breakable. Kevin