Axle temp

You are not over 250 degrees? Twin sticks to the dash!!!

 

I appreciate your diligence but maybe you are over thanking things a bit?
Was taught to touch the tires and the hubs when you came in off the road. If you smell a burning rubber smell you probably have a tire going bad. A tire low on air pressure will be hot. If you are really concerned about steel spit on it. If it boils you have a problem. Heat guns a good tool. Good day Sir.

 

I believe temp differences in hubs would because of which wheel bearing more of the load-being turned. Not all wheels are being turned at same time.

 

Yes - RF wheel end will be higher, front axle higher than rear.

I went through this about 8 years ago with a temp gun, and a more experienced driver explained it to me.

I put the temp gun away after that and devoted my over analyzing to envisioning whirled peas.

 

I question that somewhat but will not say it is incorrect.
Do know that a bearing adjusted on the tight side will run a little hotter.

 

Bear in mind there is a large difference side to side depending on sun side vs shade side, can be as high as 40 degrees on its own

A 10 degree diff side to side on same hub isnt anything to worry about, like boxcarr said, if it sizzles, thats no good

 

Front drive has many more moving parts. That's where the main discrepancy in temps between front and rear come from.

As for left and right varience the only thing I can think of (besides wheel bearing adjustment) is the position of the carrier in the housing.

 

Shorter axle in a diff may run hotter due to less mass to dissipate heat. Most twin screws without interaxle power divider locked in power the right side axle in the front diff and left side in the rear diff. 9 times out of 10 when an axle twists off and snaps it is either right front or left rear.