'01 4wd shift on the fly problem - Diesel Forum - TheDieselStop.com
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99 & up 7.3L Power Stroke Engine and Drivetrain Discussion of the 99 & up 7.3L Power Stroke diesel engine and drivetrain in the 1999-Up Super Duty trucks and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 10-28-2006, 06:01 PM   #1 (permalink)
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'01 4wd shift on the fly problem

SITUATION - 15 mph in a pasture field, soft ground

PROBLEM - Shifted my 2001 F350 dually into 4wd high (electronic shift on the fly with hubs set at automatic) and front wheels locked up and would turn

Clues - got her back onto the gravel lane and could hear grinding coming from front hubs. would not dissengage after flipping swtich on dash. finnally dissengaged after manually swithing hubs from auto to locked and back to auto.

Any help with diagnosis would be greatly appreciated.
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Old 10-29-2006, 07:29 PM   #2 (permalink)
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Re: '01 4wd shift on the fly problem

Welcome to TDS. First thing I would do is remove the hubs and clean them up. It is real easy to do. Try a search and you should find how to do it. If you don't just post back and we'll find it for you.
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Old 10-30-2006, 04:11 PM   #3 (permalink)
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Re: '01 4wd shift on the fly problem

thanks Joe. I looked here for step by steps for removing the hubs and didn't run across anything. is it on Diesel Stop?
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Old 10-30-2006, 07:18 PM   #4 (permalink)
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Re: '01 4wd shift on the fly problem

Also check for leaks with a cracked vaccum hoses that go to the hubs. Most change them out to SS hoses from www.dieselsite.com , makes a big difference. Also, cleaning and greasing the hubs, is a good idea.
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Old 10-30-2006, 08:15 PM   #5 (permalink)
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Re: '01 4wd shift on the fly problem

[ QUOTE ]
thanks Joe. I looked here for step by steps for removing the hubs and didn't run across anything. is it on Diesel Stop?

[/ QUOTE ]

Here is Gruzzle's Hub Lub which is pretty intensive. I've never taken mine that far apart. I just flush them with WD40. Works for me.
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