locked front drive shaft

On Fri, 22 Sep 2006 02:42:11 GMT, "Brian 13" wrote:

>I have a "99" Chevy Silverado. The problem is the four wheel drive is locked
>in place. I have the auto 4 wheel drive push button on my truck. The 4 wheel
>drive is not engaged, but it is locked and the drive shaft spins even though
>I have it set on 2 Hi. What could it be?



Could be a lot of things but the button or the control module would be
my first guess because two things need to lock for 4wd. The front axle
disconnect and the Tcase. The fact that neither is doing so points to
these items. (if front disconnect or Tcase engage you would not be
able to spin front drive shaft.)
-----------------
TheSnoMan.com
 >> Stay informed about: locked front drive shaft 

"SnoMan" wrote in message

> On Fri, 22 Sep 2006 02:42:11 GMT, "Brian 13" wrote:
>
>>I have a "99" Chevy Silverado. The problem is the four wheel drive is
>>locked
>>in place. I have the auto 4 wheel drive push button on my truck. The 4
>>wheel
>>drive is not engaged, but it is locked and the drive shaft spins even
>>though
>>I have it set on 2 Hi. What could it be?
>
>
>
> Could be a lot of things but the button or the control module would be
> my first guess because two things need to lock for 4wd. The front axle
> disconnect and the Tcase. The fact that neither is doing so points to
> these items. (if front disconnect or Tcase engage you would not be
> able to spin front drive shaft.)
> -----------------
> TheSnoMan.com

Sno,

How did you determine it's not in 4 wheel drive or the axle is not
disengaged from what he wrote? I can't. He said "it is locked and the drive
shaft spins even though I have it set on 2 Hi." He may be saying the drive
shaft turns when he's driving it??

Al
 >> Stay informed about: locked front drive shaft 

On Fri, 22 Sep 2006 08:34:29 -0700, "Big Al" wrote:

>How did you determine it's not in 4 wheel drive or the axle is not
>disengaged from what he wrote? I can't. He said "it is locked and the drive
>shaft spins even though I have it set on 2 Hi." He may be saying the drive
>shaft turns when he's driving it??


Maybe but still the same in that either the tcase in that failing to
disengage or the axle disconnect failing to decouple would cause drive
shaft to turn with vehicle motion. If you jaceup one front tire and it
turns with drive shaft then front axle is not decoupling. If drive
shaft does not turn then tcase is not disengaging.

You know "Al" you could focus more on helping and less on a being a
twit.
-----------------
TheSnoMan.com
 >> Stay informed about: locked front drive shaft 

On Fri, 22 Sep 2006 08:30:25 -0700, "Big Al" wrote:

>I'm missing something.


No doubt about that at all...
-----------------
TheSnoMan.com
 >> Stay informed about: locked front drive shaft 

"SnoMan" wrote in message

> On Fri, 22 Sep 2006 08:30:25 -0700, "Big Al" wrote:
>
>>I'm missing something.
>
>
> No doubt about that at all...
> -----------------
> TheSnoMan.com

Look who is calling whom a twit. People that live in glass houses should not
run around naked.

Al
 >> Stay informed about: locked front drive shaft 

"SnoMan" wrote in message

> On Fri, 22 Sep 2006 08:34:29 -0700, "Big Al" wrote:
>
>>How did you determine it's not in 4 wheel drive or the axle is not
>>disengaged from what he wrote? I can't. He said "it is locked and the
>>drive
>>shaft spins even though I have it set on 2 Hi." He may be saying the drive
>>shaft turns when he's driving it??
>
>
> Maybe but still the same in that either the tcase in that failing to
> disengage or the axle disconnect failing to decouple would cause drive
> shaft to turn with vehicle motion. If you jaceup one front tire and it
> turns with drive shaft then front axle is not decoupling. If drive
> shaft does not turn then tcase is not disengaging.
>
> You know "Al" you could focus more on helping and less on a being a
> twit.
> -----------------
> TheSnoMan.com

Here is what you said:

"Could be a lot of things but the button or the control module would be
my first guess because two things need to lock for 4wd. The front axle
disconnect and the Tcase. The fact that neither is doing so points to
these items. (if front disconnect or Tcase engage you would not be
able to spin front drive shaft.)"

Sno,

Where did he say he could spin the drive shaft? Just copy and paste it.

Al the twit, but not the Snojob
 >> Stay informed about: locked front drive shaft 

I have a 99 Z-71 LT with pushbutton electronic transfer case. Mine is most
definately stuck in 4WD. I have mashed freaking buttons for hours, but
still stuck. When I could still get it to come out it would put itself
back in everytime I caranked it automatically. If I would have thought of
it, I should have took out a fuse or something then to keep it out. But
now it is stuck, is there any way of getting this blessed thing out of 4wd
other than manually dropping the transfer case and dismanteling it? Your
help would be very much appreciated as I am on the brink of blowing it to
kingdom come.
 >> Stay informed about: locked front drive shaft 

Unless they happen to be good looking females, then it's OK!

Al
Bottoms Up Divers


"Big Al" wrote in message

>
> "SnoMan" wrote in message
>
>> On Fri, 22 Sep 2006 08:30:25 -0700, "Big Al" wrote:
>>
>>>I'm missing something.
>>
>>
>> No doubt about that at all...
>> -----------------
>> TheSnoMan.com
>
> Look who is calling whom a twit. People that live in glass houses should
> not run around naked.
>
> Al
>
 >> Stay informed about: locked front drive shaft 

Replace the push button switch (about $50 if you DIY), if that's not your
problem now it will in the near future.

Al

"jeremytn86" wrote in message

>I have a 99 Z-71 LT with pushbutton electronic transfer case. Mine is most
> definately stuck in 4WD. I have mashed freaking buttons for hours, but
> still stuck. When I could still get it to come out it would put itself
> back in everytime I caranked it automatically. If I would have thought of
> it, I should have took out a fuse or something then to keep it out. But
> now it is stuck, is there any way of getting this blessed thing out of 4wd
> other than manually dropping the transfer case and dismanteling it? Your
> help would be very much appreciated as I am on the brink of blowing it to
> kingdom come.
>
 >> Stay informed about: locked front drive shaft 

Brian 13 wrote:

> I have a "99" Chevy Silverado. The problem is the four wheel drive is
> locked in place. I have the auto 4 wheel drive push button on my
> truck. The 4 wheel drive is not engaged, but it is locked and the
> drive shaft spins even though I have it set on 2 Hi. What could it be?

We need more information. You do realize that it's "normal" for the
front driveshaft to turn even in 2hi. This is an automatic t/case and the
clutch pack that engages the front driveshaft is designed to put 5% torque
towards the front driveshaft even in 2hi. In fact, if you crawl under the
vehicle and attempt to turn the front driveshaft while it's in 2hi (this is
assuming the front axle is disconnected, which it should be in 2hi) you
should be unsuccessful. This is the way it's designed.

So what we need to know is: are you just worried because you see the
front driveshaft turning even in 2hi, or is it actually locked in 4x4 while
showing that it's in 2hi. If it's the former....you don't need to worry
about
it. If it's the latter...then we can move on to the diagnosis.

Ian
 >> Stay informed about: locked front drive shaft 

SnoMan wrote:

> Maybe but still the same in that either the tcase in that failing to
> disengage or the axle disconnect failing to decouple would cause drive
> shaft to turn with vehicle motion. If you jaceup one front tire and it
> turns with drive shaft then front axle is not decoupling. If drive
> shaft does not turn then tcase is not disengaging.
>
> You know "Al" you could focus more on helping and less on a being a
> twit.

Here is the problem, Snojob! As far as I can tell, "Big Al" is actually
interested in finding out what the actual problem is and then intelligently
try to help the original poster. What you do is simply throw out whatever
advice you think might be relevent "even" if you don't have a clue how
the system works.

Look at your one statement in your paragraph above. "If driveshaft does
not turn, then t/case is not disengaging". This is totally false, shows
that
you do not (yet) understand how the modern NVG 246 t/case works,
and leads some poor sap looking for "correct" information on a wild
goose chase.

Sometimes I think that you simply want to see how many threads that
you can respond to, whether or not you give useful information appears
to be totally irrelevent to you. I hate this type of poster. You think you
are being helpful, but you aren't. And then you end up with a crowd of
hanger-on's that believe much of what you say is true, when it isn't.

Ian
 >> Stay informed about: locked front drive shaft 

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 >> Stay informed about: locked front drive shaft 

"shiden_kai" wrote in message

> Brian 13 wrote:
>
>> I have a "99" Chevy Silverado. The problem is the four wheel drive is
>> locked in place. I have the auto 4 wheel drive push button on my
>> truck. The 4 wheel drive is not engaged, but it is locked and the
>> drive shaft spins even though I have it set on 2 Hi. What could it be?
>
> We need more information. You do realize that it's "normal" for the
> front driveshaft to turn even in 2hi. This is an automatic t/case and the
> clutch pack that engages the front driveshaft is designed to put 5% torque
> towards the front driveshaft even in 2hi. In fact, if you crawl under the
> vehicle and attempt to turn the front driveshaft while it's in 2hi (this
> is
> assuming the front axle is disconnected, which it should be in 2hi) you
> should be unsuccessful. This is the way it's designed.
>
> So what we need to know is: are you just worried because you see the
> front driveshaft turning even in 2hi, or is it actually locked in 4x4
> while
> showing that it's in 2hi. If it's the former....you don't need to worry
> about
> it. If it's the latter...then we can move on to the diagnosis.
>
> Ian

Ian,

If it's in 4 wheel drive will it "crab" if you turn the wheels on pavement
or is the t-case like the old Jeep Eagle? I'm assuming the front axle never
disengages if the t-case supplies power in 2 Hi. Or does it?

I admit I'm not up on this system. How close is it to what's in a Hummer?
And if you would, how does a Hummer lock the rear differential?

Al
 >> Stay informed about: locked front drive shaft