I thought I would rattle a few cages here. I still like mine, and it's great for what I need, but the point was that when you have one person with no cargo, it does fine. It was sold to be optimal that way. When you start loading it up and adding big tires and more passengers it's target 'zone' for optimal power and acceleration go south quickly. You can keep gearing down, but the AW-4 already has the widest ratio of the autos of the era. Every drop in gear ratio (numbers up) equals a commensurate drop in mpg. No more loafing engine. No way to get around that. My bro built his '99 XJ to include ARB's, 4.56 gears, 33's, 5" lift, Ford 9" rear end, 9K pound winch and bumper, 4:1 T. case and it was the bomb. But he never got very good mpg with all that stuff hanging on it. If he were to do it again, it would be 4.10's instead of 4.56's. Traveling @ 75 mph on the interstate sucked the fuel big time.
The Dana 35 has a 2700 pound load rating from Dana. For safety reasons, car mfgrs. usually downgrade the rating. Most of the rating is in the housing and bearing loading. The rear axle is where most of the payload resides. My Dana 80 in my RAM has an 11,000 pound load rating from Dana, downgraded to 7500 pounds by Chrysler Corp. in my application for safety reasons. I know it's no comparison, but the numbers give a range at which you can operate safely.
jefe