On the fly shifting into 4x4? - Ford Powerstroke Diesel Forum

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post #1 of 21 Old 03-06-2008, 06:43 PM Thread Starter
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On the fly shifting into 4x4?

I just scoured my owner's manual for information regarding speeds for shifting into 4x4 from 2wd, but couldn't find anything. What is the highest speed you can shift into 4wd without damaging anything?
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post #2 of 21 Old 03-06-2008, 06:46 PM
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Shifting into 4wd at speed I have always used the rule of thumb of up to 55MPH. I read that somewhere a long time ago.

I also look at it this way, anything above that you are not wanting to have to turn at that speed in 4wd.

Now, once in 4wd, I have ran my truck at over 100. BUT, that was in a straight line down a 1/4 mi track.

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post #3 of 21 Old 03-06-2008, 06:51 PM
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i always just stop. or at a roll. i dont like to chance it. but you can take it out of 4wd while moving.

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post #4 of 21 Old 03-06-2008, 06:57 PM
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i always just stop. or at a roll. i dont like to chance it. but you can take it out of 4wd while moving.
I'm the same way.

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post #5 of 21 Old 03-06-2008, 07:22 PM
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[QUOTE=DKR;483463]Shifting into 4wd at speed I have always used the rule of thumb of up to 55MPH. I read that somewhere a long time ago.



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post #6 of 21 Old 03-06-2008, 07:27 PM
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[QUOTE=Diesel Freak;483535]
Quote:
Originally Posted by DKR View Post
Shifting into 4wd at speed I have always used the rule of thumb of up to 55MPH. I read that somewhere a long time ago.



DAHMN!!
kinda what i thought. i accidently did mine at like 30 once. it grinded gears. .....

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post #7 of 21 Old 03-06-2008, 07:35 PM
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i believe 55mph is right but i dont think i would do runinng that fast


SERENITY
GOD grant me the SERENITY to ACCEPT
the things I cannot change,Courage to
change the things I can and the
WISDOM to know the differance





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post #8 of 21 Old 03-06-2008, 08:17 PM
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i say if you're at a speed to need 4x4, you're prob at a safe enough speed to engage it. i always just make sure to let off the gas during the shift



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post #9 of 21 Old 03-06-2008, 08:30 PM
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I always shift at a roll.... just seems right.

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post #10 of 21 Old 03-06-2008, 09:24 PM
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Quote:
Originally Posted by DKR View Post
Shifting into 4wd at speed I have always used the rule of thumb of up to 55MPH. I read that somewhere a long time ago.
Do you think the same for 4 low also DKR? I've always actually stopped, put in neutral, then engaged in to low then back into drive after I hear the thud. Come to think of it never actually used 4 low with this rig. But yeah 4 hi about 40 I've always felt ok.



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