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stupid 4 wheel drive question

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Old Jan 3, 2010 | 06:34 PM
  #1  
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ayden2004
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stupid 4 wheel drive question

k guys. had my 01 250 for almost 3 years now. first 4 wheel drive i ever owned. have the manual locking hubs with the lever on the floor. I have always come to a complete stop to engage/disengage my 4 wheel drive. but a buddy told me today that he is pretty sure that I can engage/disengage on the move as long as I am under 20 mph. so my question is at what speeds can I engage/disengage my 4wheel drive. thanks for your input
 
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Old Jan 3, 2010 | 06:48 PM
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As long as the front hubs are locked,,,and your rear tires are not spining faster then the front tires,,,it can be pulled into 4x4 at any speed !!

I did a test with my 06' F-350,,6.O,,,on dry pavement,,going straight,,,foot hard into the go pedal,,accelerating 50,,60,,70 mph pull the t-case lever right into 4x4 with ease,,Hubs locked all tires turning the same speed,,goes right into 4x4,,,Ofcourse I let right off and slide back into 2wd right away,,but as I said,,was a Test!
 
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Old Jan 4, 2010 | 07:53 AM
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350 is right. now if you had the auto hubs(which you don't) then the slower you're going the better. once its locked the only speed limit is common sense for road conditions. racers are using the 4x4 til over 100 mph without probs
 
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Old Jan 4, 2010 | 11:09 AM
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Wait.....
for a floor mounted transfer case you can do that ????


I know for my esof I can switch back and forth easily, but that is just the lil dash switch...

thought with the floor shifters you had to be stopped or it would crunch like a (you know)
 
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Old Jan 4, 2010 | 11:14 AM
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Originally Posted by jdadamsjr
Wait.....
for a floor mounted transfer case you can do that ????


I know for my esof I can switch back and forth easily, but that is just the lil dash switch...

thought with the floor shifters you had to be stopped or it would crunch like a (you know)
Nope...as the others said...so long as your hubs are locked, and you aren't spinning the rears, you can apply on the fly. Ford says to not exceed something like 40mph in 4x4 but I have driven about 60 before in 4x4. If the hubs are locked, and the rears aren't spinning on a slick surface, no problem to pull it into 4x4. With the hibs locked, the front axels and drive shaft are already spinning, pulling it into 4x4 just attaches the front and rear together at the T-case. But that is why you don't want to be spinning tires when you do this...the front and rears have to be moving at the same speed to engage without grinding or slamming as the t-case connects.
 
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Old Jan 4, 2010 | 01:05 PM
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That's right. I've done the same thing on my 2009 F250 with manual shift 4WD. As long as the hubs are locked, 4WD High Range can be selected at any speed as long as THE REAR TIRES ARE NOT SLIPPING.

On a side note, my hubs have been locked for over a week now because it's really wet here and I find myself using 4WD frequently.
 
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Old Jan 4, 2010 | 03:14 PM
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Ah, missed the caveat of hubs locked....
that would make them mate them betta !

FYI, wet roads are really not enough to warrant 4x4 unless you are driving too hard for the conditions and even then not good if there is not enough slippage ....

remember, 4x4 won't help you stopping and only marginally help with direction changes
 
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Old Jan 4, 2010 | 04:39 PM
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From: Freeville Ny
thanks alot for all the info. its definately going to be more convenient being able to shift in and out of 4 wheel on the fly. it was always a little annoying if I reached an area that had worse road conditions than I had been driving in. pulling over stopping putting it in 4 wheel and then getting back into traffic. I was just worried that if I took my buddies advice I could ruin something. (he is usually only right about stuff about 40% of the time)
 
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