4 wheel drive

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Apr 17, 2018 | 07:06 AM

Duke Judy

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4 wheel drive

My 2017 F250 4 wheel drive will not disengage unless I stop and back up. The dealer is saying its a vacuum and that's normal. Does anyone have this problem?

Apr 17, 2018 | 07:35 AM

Bovinerazzr

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Normal. Backing up let's the drivetrain relax and allows for disengagement.

Apr 17, 2018 | 07:43 AM

VA13FX4

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From: IA/GA/HI/FL/VA/CA/ME

No, that is not normal. Not on my 17 anyways. I’ve used 4wd dozens of times and I never stop to shift in or out. Definitely don’t have to go to reverse. Show the dealership the user manual where it talks about 4wd and ask them to show where it says going into reverse is part of the process.

Wondering if you have have your hubs in manual though instead of auto?

Apr 17, 2018 | 07:44 AM

troverman

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From: NH

I would say NOT normal. I can shift in and out of 4x4 all day and it will promptly shift in and out. Sometimes it delays for a few seconds coming out, but then it is done.

When the transfer case disconnects, you are definitely in 2WD even if the hubs take a few more seconds to disengage. Do you have the electronic **** shifter (ESOF) or the manual floor shifter?

Apr 17, 2018 | 08:14 AM

K A M

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Not normal. The system is in a bind and can't pull out. Check your hubs to see if they are in AUTO but should still go in 2H even with hubs locked. Air pressure in tires at normal, same size tires?

Apr 17, 2018 | 08:36 AM

VA13FX4

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From: IA/GA/HI/FL/VA/CA/ME

Do you have to come to a full stop and go into reverse every time? Or did it happen one time?

Apr 17, 2018 | 08:43 AM

Buliwyf

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The hubs are unrelated. Those can stay stuck engaged as long as they like. They'll rattle loose when they want to, complete non-issue.

I'm guessing your problem is selecting 2wd, and the 4wd light on the dash stays on too long. But how long is too long?

If you've been turning in high grip conditions, then your drive train is bound up. You'll need to drive straight, bounce around, or reverse to get unbound. When the dirveline gets twisted up from turning, it's like a big spring, or a big lock washer, and things get stuck.

If you drive slowly, in 2wd. Driving in a perfectly straight line. How does it shift then? Is it faster. It should only take a few seconds.

Have you been using 4wd every week? You have to exercise the system from time to time. It's fine even on pavement AS LONG AS YOU'RE DRIVING IN A STRAIGHT LINE. Slow is nice, if your hubs aren't locked.