4A acting like 4H, binding while turning on dry pavement

[Lil Red Broncette]

It’s perfectly fine for dry pavement, they make that very clear.

There’s broncos with 100k+ mileage that use 4A daily. Simply using it had nothing to do with your concern or failure.

Thanks. Some of the arguments remind me of something back with my original 88 Bronco II (and two others I later got). I would lock the hubs at the first threat of snow and leave them locked till after winter. This enabled me to switch from 2H to 4H on the fly at any speed. People would say why would you do that? The simple answer was because I didn't want to have to stop or get out in bad weather and it only cost me 1.5mpg (20.5mpg locked vs 22mpg). And while it did add wear, I would ask what is worse, leave the thing unlocked so that front axle and differential would just sit and never get warned up to drive out moisture? Or run it so it goes warm, moisture driving out, etc? Fact is I got 197K miles on that 88 B2, never had a problem with the front diff or axle.

My thought running 4A goes back to that, to give that stuff some more exercise than just under the specific conditions I need it.

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[Lil Red Broncette]

Thanks all for the comments. I appreciate it. I'll see what the shop says.