4 wheel drive is FINALLY BLOWN…

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srt10viper

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The hubs won't jump
In 4wd. They are not locked together. It's an open front diff.


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Well then I will check it out if I get it back. I know when it's in four wheel drive the front turning radius is reduced dramatically on mine.
 

Mil T

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I use 4 wheel drive 3-4 times a week for my construction business. That's why I took the videos showing it on GRASS not dry pavement. It's not always in 4 wheel drive because I can turn on a dime without the hubs jumping.

YES YES YES I have told them hundreds of times to replace the vacuum lines, but Nothing!!!!

It is really easy to check if a vac line is cracked or broken. Just put a vacuum gage on it, pump it up and see if it holds or not. attach up by the brake booster. ford should do this.

---------- Post added at 08:55 PM ---------- Previous post was at 08:47 PM ----------

Well then I will check it out if I get it back. I know when it's in four wheel drive the front turning radius is reduced dramatically on mine.

This comment makes me curious. If you are on hard surface, ie. concrete, asphalt then yes you will get the binding of the front axles and hubs which would cause severe stress on the front diff etc.
So with the comment you made about turning radius is reduced in four wheel drive, that leads me to think you are driving in 4 wheel drive on pavement of some sort at times? That would surely cause the problems you are having if continually driving like that. Only true fulltime 4 wheel drive vehicles can be driven that way due to the difference in the type of transfer case they have.
Mil T
 
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srt10viper

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They supposedly checked the vacuum lines and nothing's wrong.

As for pavement driving the only time we have drove it on pavement was AFTER it was broken. The dealer can not drive it on dirt to see if it's broken. I have 47 super duties and my raptor in my fleet. The raptor is THE only 4 wheel drive I have EVER had that has done this non sense. Believe me I have owned HUNDREDS of 4x4's and know when to use it and how they work. That's why this is so frustrating....
 

Yukon Joe

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Ok dropped it off this morning and picked up a loaner. They called me and said the Right IWE was blown, right axle and hub so far. AMAZINGLY these parts were already replaced 2 months ago with 2000 miles on it. SMH. Still have not heard back from Ford on the voluntary buy back... 5 th time in shop and 35+ days in shop.

Thought you were going to let them buy it back?

Yukon Joe
www.RUNRAPTORRUN.com
 

BramageDained

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This comment makes me curious. If you are on hard surface, ie. concrete, asphalt then yes you will get the binding of the front axles and hubs which would cause severe stress on the front diff etc.
So with the comment you made about turning radius is reduced in four wheel drive, that leads me to think you are driving in 4 wheel drive on pavement of some sort at times? That would surely cause the problems you are having if continually driving like that. Only true fulltime 4 wheel drive vehicles can be driven that way due to the difference in the type of transfer case they have.
Mil T

A big part of why it fights you is that there is no center diff. Since the front does the steering and the rear just follows they go through different sized arcs. No center diff is the difference between AWD and 4WD This is the difference between AWD and 4WD.

As an example a friend has an Evo (AWD) with a malfunctioning ACD pump. The ACD pump controls the lockup of the center diff. With the malfunction the center diff is locked which causes it to behave just like a truck in 4WD.
 
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