The axle shaft strength (tested by Warn Ind.) is as follows:
F8.8= 6,500 (lb. ft.)
D44= 4,600-5,000 (lb. ft.)
D35C= 4,000-4,300 (lb. ft.)

Dana 35 rear axle COT: 870 MOT: 3480
Dana 44 rear axle COT: 1100 MOT: 4460
Ford 8.8 28spline axles COT: 1250 MOT: 4600
Ford 8.8 31spline axles COT: 1360 MOT: 5100
Dana 60 semifloat COT: 1500 MOT: 5500
COT: Continuous output torque rating
MOT: Maximum output torque rating

 

i posted that a little earlier in the thread

 

So did I.

 

I'm thinking of purchasing a 8.8 out of a ranger fx with 31 spline,torsen lsd & 4.10 already set up for xj with leaf springs and shocks for $400 and the d30 hp front axle with 4.10 also for $400. The more I think about it, I dont know if it is a good deal. I was only thinking about it because i can do the swap in a day.

 

Dana 30's not... If fhe 8.8 is a bolt in forba xj then its at least average on price... Wouldnt call it a deal

 

I wouldn't pay $400 for a D30. They're too easy to come by - unless you meant both for 400. Also, has the 8.8 been rebuilt or anything else? Disk brakes? I dunno ... I paid $300 for mine regeared to 4.56 with disks. But then you say it has leafs & brackets so I assume it's coming out of an XJ. Maybe you can create your own deal with the seller. $800 for those 2 is way too much.