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  #1  
Old 11-28-2009, 08:49 PM
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What max speed in 4x4?

It will soon be snowing here and I will be doing considerable more driving on the highways and expressways.

So, I have a 150 302 e4od 4x4 with the twin I-beam axle up front, I have looked the manual inside out, and have searched posts to no avail. I'm sure it has probably been discussed on here somewhere, but I could not find the post.

So if anyone knows what is the speed recomended for 4x4 safely on highways, I would appreciate it.
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Old 11-30-2009, 11:35 AM
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well, you shouldn't run the t-case locked in if the pavement is dry.
luckily with our trucks, we can shift on the fly, unlike chevies and dotches which will usually detonate if you slam them into lock.
I'd let off on the pedal though to reduce the pressure.

anyways.
I rarely drive over 55 while locked in.
I've seen people pass me on bad roads in snow locked in going 70+
I dont really see this to be necessary.
but then, i dont see the flat tire I have to fix today to be necessary as well.
gah, that bites my biscuits.

With the front locked in, and good parts, I woudln't worry to much about how fast you drive.
if the parts are worn, they will make a hell of a racket when the front is locked in.
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Old 11-30-2009, 11:35 AM
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well, you shouldn't run the t-case locked in if the pavement is dry.
luckily with our trucks, we can shift on the fly, unlike chevies and dotches which will usually detonate if you slam them into lock.
I'd let off on the pedal though to reduce the pressure.

anyways.
I rarely drive over 55 while locked in.
I've seen people pass me on bad roads in snow locked in going 70+
I dont really see this to be necessary.
but then, i dont see the flat tire I have to fix today to be necessary as well.
gah, that bites my biscuits.

With the front locked in, and good parts, I woudln't worry to much about how fast you drive.
if the parts are worn, they will make a hell of a racket when the front is locked in.
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Old 11-30-2009, 11:43 AM
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isnt there a sticker on backside of visor advising against speed in 4wd
and vehicle roling if transfer case is in between gears
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Old 11-30-2009, 12:36 PM
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Doh! tripple post!?

crazy.

Vehicle rolling if t-case is between gears, what do you mean?
how will the vehicle roll over if the t-case is in neutral?
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Old 11-30-2009, 06:36 PM
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Well I have the Manual Locking Hubs, so no shift on the fly to worry about here. And with almost 160,000 on her, I guess the parts may be a little worn. and it doesn't help it was an old landscape truck, so I'd imagine not many new parts.

I didn't think to look at the visor, I'll do that.

Thanks for the Replies.
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Old 11-30-2009, 08:54 PM
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Quote:
Originally Posted by Talyn View Post
Doh! tripple post!?

crazy.

Vehicle rolling if t-case is between gears, what do you mean?
how will the vehicle roll over if the t-case is in neutral?
you know what i mean well maybe you dont
my point was there's always a warning sticker on the back of sun
visor about vehicle operation while in 4wd
or to not leave transfer case in neutral without setting park brake
now were off topic
i think the general rule is 40-45 MPH
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Old 12-01-2009, 07:55 PM
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oh. well, it doesn't say anything on the visor about speed, yep, just those pesky warnings. Ha.

Well, I don't know about me going 45 like chev joe suggested, I guess I just won't be able to break the sound barrier with the old girl The Tortoise always did win the race, huh.
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Old 12-02-2009, 02:43 AM
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I know in the F250 Manual from ford it says 75mph is Max in 4HI but not to shift into 4HI above 45mph if I remember right. I agree with everyone about not needing to go over 45-50mph in 4X4 locked in or not. If you need it probably not the best time to be out hot ******* anyway.
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Old 12-02-2009, 09:10 AM
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I have ran 65 and lower. But truthfully, if you are in the need a 4x4, you most likely dont want to tbe going that fast anyways. Its a breeze getting to speed , its the stopping you have to worry about.
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Old 12-03-2009, 12:12 PM
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yea, hard to stop an automatic in 4wd.
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Old 12-04-2009, 03:57 AM
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you cant stop a dozer on ice an snow
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Old 12-04-2009, 09:20 AM
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You can stop them on snow, but nothing stops on ice.

Its fun to see 600 horse tractors go sideways with 8 tires on them.
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Old 12-04-2009, 01:07 PM
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Unhappy

William It maybe fun to see but it is no fun if you are driving the rig.
ice and snow is no fun with big rigs. 55-60mph is good or less

Last edited by Capital Customs; 12-04-2009 at 01:09 PM. Reason: missing info
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Old 12-05-2009, 11:10 AM
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****, thats why the big rigs always drive 70 here in bad weather?

They have the weigh advantage in the slush and ick, but still bad with ice.

I'm talking about tractors, not road tractors.
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