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When engaging the auto hubs, you need to be stopped before doing so, once locked in they will stay locked in until you reverse direction, you can shift in and out at any speed as long and front driveline running same speed as rear, lifting throttle helps engagement and disengagement. I manually lock in the hubs 6 months a year, shifting in and out of 4wd 60-80mph is never an issue. The f150's are not comparable, the front driveline and hub assembly are engaged 100% of the time, it never stops rotating, the only difference is if it is engaged in the TC or not.
Actually the newer F150 uses a design which disengages the hubs. They are locked when the engine is off, disengaged when the engine is on (unless 4x4 is engaged). If the hubs fail, they fail locked in, so you never lose 4x4.
Actually the newer F150 uses a design which disengages the hubs. They are locked when the engine is off, disengaged when the engine is on (unless 4x4 is engaged). If the hubs fail, they fail locked in, so you never lose 4x4.
The f150's are not comparable, the front driveline and hub assembly are engaged 100% of the time, it never stops rotating, the only difference is if it is engaged in the TC or not.[/QUOTE]
I have a 09 F150 and I'm pretty sure the front hubs are vacuum activated. I did not think the entire front end was turning. I guess it makes sense that they would need to be turning to allow the shift on the fly to work. But I have been wrong before.