Newby story here, so you guys that know this stuff like the back of your hand: bear with me. I'm at the grade-school level of MJs. I thought this experience might interest those not so familiar with MJ/XJ rear ends.
So I was at the junkyard yesterday and ran into a fella that was pulling an axle from an XJ. Being the proud new owner of an MJ...and desperately seeking knowledge, I was asking him about XJ/MJ rear ends. This guy is a serious off-roader. He had cooked two rear ends in like that last year. I told him that I had the D35 and he confirmed what I had already read, that it is a basic, road-happy, medium-duty choice. I told him that my truck was serving as transportation to work, light/medium hauling here and there and occasional drive-in-the-woods to pick up a load of firewood duties. He said I'd likely be just fine.
He loves the D44s he said, but his choice for his XJs were 8.25s. His opinion was that the D44 is awesome and slightly better, but the 8.25s were plentiful and as hard as his is on rear ends, he rates availability higher on his priority list than slightly better strength and durability.
One interesting experience he shared was when he cooked his last one. Said he just came off the trail and was at a traffic light in town. Nothing appeared out of the ordinary, no noises, nothing. The light turned green and he found that he just couldn't move. Said he dropped her in 4wd and drove her home that way. Now there's a tip that this newby will remember. BTW, I will be on the constant lookout for a D44 from an MJ. I'll take it easy on my D35, and If I ever cook it, then I only want to do a swap one, final time.