Front Drive Shaft??? - Ford Powerstroke Diesel Forum
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Old 08-25-2010, 02:20 PM
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Front Drive Shaft???

well my ? is does the front driveshaft turn all the time?? i do have the auto lock hubs. the basis for the ? is i had the cv joint go bad on me here and it was making a heck of a screeching/grinding noise?? so i talked to a big psd guy here localy and he said that my shaft shouldnt be turning unless i put it in 4x4 just wanted some others to shed some light on the subject?? thanks in advance

P.S. i just put new seals in the hubs and new bearing plus new bushings up front all the way around
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Old 09-04-2010, 08:43 PM
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yes it will turn, because it is connected to the front differental, the engaging process is at the transfer case, so while in 2wd, no power is being sent to the front, but as long as all four tires are on the ground, they will spin, and obviously in 4wd, power is being sent to the front, its just that the spining is coming from the transfer case when engaged in 4wd, and the spining from 2wd is coming from the rear tires pushing
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Old 09-07-2010, 12:08 PM
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Well, if not in 4WD and the hubs are unlocked, the front shaft should not turn. That is the purpose of selectable hubs. Is your truck lifted? If a CV joint, is the differential aimed at the front output? You may be running an angle that puts too much strain in the joint.
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Old 09-07-2010, 12:12 PM
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^^^ What he said. Should not turn with hubs unlocked and in 2WD.
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Old 09-07-2010, 12:16 PM
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In a standard driving situation you should have your front hubs unlocked and your transfer case in 2wd. In this case, your front drive shaft should not turn while your driving. If it is, your hubs are either not unlocking or transfer case is stuck in 4wd. Either case will hurt your fuel mileage and cause unnecessary wear on your truck.
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Old 09-26-2010, 05:31 AM
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Yea the front shafts do NOT turn while in 2wd. Neither does the front propshaft.
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