Max speed while in 4x4 HI and LO - Page 2 - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #26  
Old 01-27-2009
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I've gone into 4wd HI, going at hwy speeds, 100 kph (about 60 mph), from 2WD when hitting snowy patches - no problems; no clunks, whining or any other indications that the 4wd HI couldn't take it - going into 4wd at these speeds almost always means you're going to slow down soon after.

Couldn't tell you the "absolute" limits - don't think that it's wise to go much faster if the conditions warrant that 4wd is used.

4wd LO, I've only used a few times - fastest I've gone in LO is less than 50 kph (probably around 25 mph) - in 4wd LO, you'll know when you're approaching the limits - you'll hear it.
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  #27  
Old 01-27-2009
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why were you driving 55 in 4hi for 22 hours? were the roads that bad?
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  #28  
Old 01-27-2009
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i went about 65 to 75 for 2 hours and never had a problem
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  #29  
Old 01-27-2009
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Longest I've had the truck continuously in 4wd (HI) was also for a couple of hours - average speed though was under the 70 - 80 Kph range (~45 - 50 mph).
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  #30  
Old 01-27-2009
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Quote:
Originally Posted by dangerranger93 View Post
why were you driving 55 in 4hi for 22 hours? were the roads that bad?
yes, at first i was doing just 2wd just fine but i almost lost it and got hit by a semi and slammed into a concrete barrier so i decided i best turn the 4x4 on and take my chances and to top things of it was so cold out that the salt on the roads would not melt anything so it was super slick out and my BFG M/T's dont work well in stuff like that
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  #31  
Old 01-27-2009
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Mine use to whine at about 45mph if I was in 4hi. I dont know why, but I used 4wd once a week and never had a problem with it at slower speeds. In 4lo, like others have said you top out rpms before you get going very fast.
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  #32  
Old 01-27-2009
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I run 65 when in 4 HI. No problems yet.
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  #33  
Old 01-27-2009
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40-45 is the max in 4hi, around 10 is the max in 4lo.
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  #34  
Old 01-27-2009
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Quote:
Originally Posted by silverspeed03 View Post
So it's safe to say that I shouldn't have a whine at about 40mph. What could the whining be? BTW the oil in the transfer case was just recently topped off and no known leaks to speak of
the whine could just be the front diff
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  #35  
Old 01-27-2009
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I drive in 4 hi and I go 50-55 mph and I didn't have any problems. Still shift into 4 hi and 4 lo.
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  #36  
Old 01-27-2009
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Quote:
Originally Posted by 1996Ranger4x4SuperCabSTX View Post
PERSONALLY I have NEVER seen it written down by Ford about how FAST you can drive while engaged in 4x4 high!!! BUT I have seen it written down by Ford in the manuals about how fast you can be going ( WHEN YOU FLIP THE SWITCH TO GET INTO 4X4 HIGH) .
My manual CLEARLY STATES that the max speed that you should go in four wheel drive is 55 do the wear and tear on the parts, and that if the road conditions warrant the use of four wheel drive, for the safety of drivers, passengers, and other people, you shouldn't be going faster then that (using more technical terms, obviously, as I am a lame man).

I'll try to find my manual and take a picture of that little tid bit.
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  #37  
Old 01-27-2009
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I use 4 hi all the time, like 65 no problem, 60 today pulling a tripple sled trailer. But alberta roads are often icey and snow covered. It says in the owners man, not to engage above 75 km/h in cold weather

4 low, like 10 and she's screaming
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  #38  
Old 01-27-2009
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Quote:
Originally Posted by My05edge View Post
i drove to work this morning going 55 in 4hi, ive been offroad and doing 55 in 4lo, you will max the rpm before anything else in 4lo
How can you go 55mph in 4LO? Mine tops out at 35mph on overdrive in 4LO.
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  #39  
Old 01-27-2009
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Quote:
Originally Posted by k.blakeley View Post
How can you go 55mph in 4LO? Mine tops out at 35mph on overdrive in 4LO.
I think the auto trucks has a speed limiter in 4WD low and the manuals do not.
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  #40  
Old 01-27-2009
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In 4 low at like 20 km/h in alretty at like 5000 RPM
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  #41  
Old 01-27-2009
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Quote:
Originally Posted by rangerfx427 View Post
40-45 is the max in 4hi, around 10 is the max in 4lo.
I drove about 30 minutes in 4lo going about 35 MPH I can tell you that you def. shouldn't go above 35 MPH, you'll know why if you do it. But you can def. go faster than 10.

I've gone 55 in 4hi no problem to.
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  #42  
Old 01-27-2009
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my dads old bronco i could only get up to about 40 in 4 lo it got stuck one time
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  #43  
Old 01-28-2009
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i use 4hi up to whatever speed i need. i know several times it has been engaged while going 60-65mph.
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  #44  
Old 01-28-2009
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I use 4x4 if it's snowy or really slick on my trip home from school which is a 60 mile commute. Generally I'll go 70mph in 4wd, it can go faster with no harm I'm sure, like beard pointed out. I don't know why everyone thinks I'm going to blow up my transfer case, is it just going to say "NO" and explode...I think not.
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  #45  
Old 01-28-2009
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I work at Borg Warner and the test techs said not to go over 20 or 25 in 4lo. They would test them on dry, wet, and snowy roads. I figure they know what they're talkin about since they build and test them. Well, they used to until they got laid off. Not really sure about 4hi, but when i went on a car test with on of the guys, we were goin at least 50 mph.
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  #46  
Old 01-28-2009
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Quote:
Originally Posted by fddriver02 View Post
I think the auto trucks has a speed limiter in 4WD low and the manuals do not.
I dont think mine does I was doin 35mph at 4500rpm. Just didn't want to push it further.
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  #47  
Old 01-28-2009
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Quote:
Originally Posted by k.blakeley View Post
I dont think mine does I was doin 35mph at 4500rpm. Just didn't want to push it further.
In low?
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  #48  
Old 01-28-2009
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Quote:
Originally Posted by fddriver02 View Post
In low?
yep
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  #49  
Old 01-28-2009
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Quote:
Originally Posted by k.blakeley View Post
yep
I remember there is a speed limit in 4wd low with the autos. Was that 35 mph redline in top gear?
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  #50  
Old 01-28-2009
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Quote:
Originally Posted by fddriver02 View Post
I remember there is a speed limit in 4wd low with the autos. Was that 35 mph redline in top gear?
the rpm where getting on up there pretty quick,this was when i first got the truck 3 years ago and I believe it got to 4500rmp before i let up in overdrive.
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