4x4 ?s
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Posting Guru
Joined: Aug 2007
Posts: 1,601
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From: Cato Arkansas
4x4 ?s
what is the max speed to drive these trucks in 4x4?
do your trucks seem to have a lot less power when 4x4 is on?
when you lock your front hubs in does the truck make more noise from the front end from all the stuff turning?
do your trucks seem to have a lot less power when 4x4 is on?
when you lock your front hubs in does the truck make more noise from the front end from all the stuff turning?
Posting Guru
Joined: Feb 2008
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From: Lubbock, Texas
lol its noisy at least until something breaks
Posting Guru
Joined: Aug 2002
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I get some more noise with the hubs in and the Tcase in 2wd. Usually try to stay under 60 w/the hubs in but have ran older trucks faster. 4x4 ingaged under 45, but as mentioned the conditions should be slick enuf to need 4x4.
Posting Guru
Joined: Mar 2007
Posts: 1,842
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From: hillsborough nj
i race at the strip with my hubs locked in (obviously) and i trapped 93.81... it didn't make any noise and no vibrations till i let off... but i do have 33" mud tires and they did still vibrated in 2wd trapping 93.84
Senior User
Joined: Sep 2008
Posts: 217
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From: marinette wi
why do u you ask? hwy speed ? if you would ever drop the pin in the front end at hwy speed you would never do it again frot wheels lock up and you cant steer i know first hand happend years back to my 79 not fun. but i still do it evey time it snows as i have a plow hanging on the front. now if your truck is rumbling and all u-joints are good you need to ajust your air in the tires do not go over the psi on the tire , but air up according to what is on the door post the front is never the same as the back and is on most all cars and trucks and yes it madders 2 wheel or 4 wheel
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Cargo Master
Joined: Jul 2006
Posts: 2,756
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From: Nampa, ID
I'm not racer; just curious.
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Cargo Master
Joined: Jul 2006
Posts: 2,756
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From: Nampa, ID
Once I'm up to about 35 - 40 mph, I'll shift out of 4HI. If I'm moving that fast, there isn't much of a need for four wheel drive.
I NEVER shift into 4HI when I'm going faster than 35 - 40 mph.
I NEVER shift into 4HI when I'm going faster than 35 - 40 mph.
Posting Guru
Joined: Sep 2004
Posts: 1,096
Likes: 2
From: Ohio
there is no limit for what you can run in 4 HI. Its a drive line, and designed for heavy torque, amplified when in LOW. Shifting from 2 to 4 should never be done while rear end is slipping, and should ideally be done under 45 mph.
FYI, years ago, Lamborghini made a truck that was stock and clocked WELL over 120 mph in 4wd, looked like a modern day smaller version of a hummer.
FYI, years ago, Lamborghini made a truck that was stock and clocked WELL over 120 mph in 4wd, looked like a modern day smaller version of a hummer.
Logistics Pro
Joined: Jan 2005
Posts: 4,129
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From: Brandon, MB
It's no different (the shifting part) than using any old straight-cut-geared tranny. You just have to match RPMs and be gentle. Even shifting from 4 low to high, or the other way around. Be VERY careful, and definitely not under power for the lo-high shift.
Fleet Mechanic
Joined: Mar 2007
Posts: 1,313
Likes: 6
From: Rio Rancho NM
If you have manual hubs and they are locked in, it should be safe to shift in or out of 4WD at any speed. With auto hubs I would be stopped when shifting into or out of 4WD. Spinning your front axle up to speed from a dead stop in an instant is not good for the hubs when they engage, or the ujoints on the axle and driveshaft, or tcase front output I would suspect.