Frontend Not Disengaging - Ford Powerstroke Diesel Forum
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Old 06-22-2014, 01:23 PM Rookie

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Frontend Not Disengaging

I bought a 1997 Ford F250 7.3 Powerstroke a few days ago and I'm wondering why my front driveshaft and axles do not turn freely in 2wd. The truck is equipped with the autolocking hubs, so no manual settings I guess? What's weird is when you pick the front of the truck up, you can roll the front wheels without turning the axle or driveshaft. But when I wen to the driveshaft to turn it, it was hardtop move to begin with, then wheni got it rolling it rolled the left wheel forward for a while, then the right engaged in reverse? Back and forth some more, and they both started forward. Then go to the wheels to turn them and its like they unlock off the axle (Btw, wheels feel like they're a little tough to turn, not sure if brakes or what).Is this the autolocking hubs sensing driveshaft movement? While on the ground, the front axle and driveshaft do not roll when in 2wd, but it also doesn't spin freely by hand like I believe it should. I'm wondering if it's in these hubs or somewhere else. I know nothing about it, therefore I'm not wanting to tear off into it. However, can someone give me a little advice? If the front end is locked together, am I tearing the truck up? The front tires are a little chopped up, so I have no clue how long it has been like this. Maybe its just the weight of the truck that made them that way? Please help me asap, I would appreciate it. Maybe someone has had this issue or a write up on this. Thanks!
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Old 06-22-2014, 08:50 PM
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It sounds normal. There is no vacuum actuating the hubs like on the 99+, they just lock after you engage the drive shaft and roll forward a bit. My guess for the tires getting chopped up is alignment. The D50 TTB in the OBS F-250 is notorious for causing alignment issues.
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Old 06-23-2014, 06:21 AM Rookie

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So what you're saying is, if the axle and driveshaft is sitting still in 2wd while the front wheels are rolling, it is fine. And basically me trying to spin the driveshaft freely like a truck with manual hubs isn't possible? Like when I go to turn the driveshaft, the front hubs are doing their job and engaging and not letting the shaft spin free? I wanna pick it up again today and make sure all is unlocked and the front wheels are spinning free. Then when I turn the driveshaft, the front should click in and start rolling. Should it be hard to spin the shaft I'm guessing because I am manually making the front wheels spin? Thanks!

Last edited by Kawaboy13; 06-23-2014 at 03:25 PM.
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