twojoints444
Registered Member
How bad is it to do freeway speeds in 4 hi with my hubs unlocked? I probably put on a good 130km b4 I clued in that the vibration was coming from my front drive shaft.....
CK5
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how much damage have i done?
- Thread starter twojoints444
- Start date
you may have caused some wear on the ujoints. You can check them, but other wise i would not worry to much about it. You should however figure out why it is vibrating, you should be able to run on the highway in 4wd with out vibes
Stomis
Professional Amateur
<Thats completely untrue. Selectable 4wd is only rated 35mph or so. >
Really? Which transfer case?
I know I have driven my 205 at highway speeds in 4wd with the hubs unlocked for days before the vibration finally clued me in.
In my case, its because the front drive shaft slip joint is worn and lets it wobble.
I assume that some cases are not rated though, and I'm curious which ones.
J.
Really? Which transfer case?
I know I have driven my 205 at highway speeds in 4wd with the hubs unlocked for days before the vibration finally clued me in.
In my case, its because the front drive shaft slip joint is worn and lets it wobble.
I assume that some cases are not rated though, and I'm curious which ones.
J.
I've run plenty of trucks at highway speed in 4hi. From Subarus (back when they had selectable t-cases) to S-10s, Jeeps, Nissan trucks, Fords, GM 1/2 tons and my current 2500HD, some selectable hubs some non. Only on snow covered roads though. That's what you do in the snow, put it in 4hi, lock in the hubs (if you have them) and go.
If your hubs were unlocked then you were not causing any driveline binding or stress from being on dry pavement.
If your hubs were unlocked then you were not causing any driveline binding or stress from being on dry pavement.
Stomis
Professional Amateur
By no means am I saying you cant use it BUT alot of manufacturers have small fine print somewhere to cover their ass in case somebody decided they want to do 90mph on the highway in 4 hi and they kill an output bearing or pinion bearing.
I dont remember if my 87 had the warning but I know my dads 97 dodge 1500 he had (np241) said right on the 4wd instructions "meant for speeds under 45mph"
I dont remember if my 87 had the warning but I know my dads 97 dodge 1500 he had (np241) said right on the 4wd instructions "meant for speeds under 45mph"
andyblack
Registered Loser
I've driven on pavement in 4wd with no issues that I know of. The only time it was noticeable was when I tried to pull in a parking space. The wheels just wanted to push forward and they hopped a little because of the u-joints trying to bind a little. We don't have salt trucks around here, so when it snows (once a year, if that) I drive on the road in 4-Hi. No problems so far. Don't forget that the NP203 was full-time 4WD, although it wasn't a "50/50 only" case like the 205 and 208 unless you put it Low Lock or whatever it's called.
My dad has always told me not to use 4hi goin faster then 35-45. I have done it once on accident and didnt notice until i got in town and went to turn onto a side street and felt it bind up. I have auto hubs.
gotblazers
1/2 ton status
if you have manual locking hubs then how were you in 4wd with the hubs unlocked?
T-case was in 4WD
To the original question, nothing will be hurt.
As for running the t-case at speed, it doesn't matter. Running in 4WD on dry pavement with a t-case that isn't meant for full time 4WD is bad but other than that there is no inherent reason that the front output would cause you to reduce speed. Probably the manufacturers trying to keep people from doing stupid things.
twojoints444
Registered Member
it is a 205 tc. My front driveshaft would be vibrating because there is the tinyest bit of play in my front driveshafts yoke. im glad i didnt cause any damage lol. thanx for all the help fellas!!
Lord no, if its a 205. If that would hurt one of those, mine would have been toast years ago. <G>
And, for what its worth, and I will get dinged for this, almost all part time units will have some vibration running with the front engaged without the hubs locked.
Because I have never seen a part time front drive shaft that did not have side to side wear in the spline unless it was almost brand new.
I think its because most of the time its stationary, and all the up and down loading from hitting bumps is occurring at the same place all the time.
Some that I have seen that had enough friction either in the hub grease or the transfer case oil to cause the front shaft to turn slowly as it went down the road in 2wd lasted a lot longer and were tighter.
J.
And, for what its worth, and I will get dinged for this, almost all part time units will have some vibration running with the front engaged without the hubs locked.
Because I have never seen a part time front drive shaft that did not have side to side wear in the spline unless it was almost brand new.
I think its because most of the time its stationary, and all the up and down loading from hitting bumps is occurring at the same place all the time.
Some that I have seen that had enough friction either in the hub grease or the transfer case oil to cause the front shaft to turn slowly as it went down the road in 2wd lasted a lot longer and were tighter.
J.
