"I would have expected the leading axle assembly to carry the higher load and experience the higher temperatures ..... ?"
If the temps are the same, as Spanners has no doubt observed, would antiskid/ torque-limiting systems play a part in this?
Rgds.
Q.
P.S. If AS and Torque-limiting have no effect, and they are still the same, perhaps the fronts do bear the higher load, but due to sheilded airflow at the rear, the front/rear temps work out at about the same value?
P.P.S. That's what I like about PPRuNe... You can get a number of different, sometimes opposing answers, but still feel more the wiser