[Guest]

My '95 T100 (see my thread on "Restoring a T100") has "on the fly"
four wheel drive that goes INTO 4 wheel drive okay, but won't come OUT
of 4 wheel drive when I move the shift lever back to 2 wheel drive.

It *will* revert to 2 wheel drive instantly if I put the truck (it's a
5-speed manual) in reverse.

I suspect the 4 wheel drive has not been used much in recent years, and
is in need of "exercise" -- but can anyone interpret what's happening
here from the symptoms I describe? Is this something I can fix? If
so, how?

Thanks!
--
Jay Honeck
Iowa City, IA
'95 T100 4x4 Extended Cab
www.AlexisParkInn.com
"Your Aviation Destination"

 

[Guest]

I believe this is common Jay. I know it is with the automatic hubs. Your
truck probably has the ADD system:
http://www.off-road.com/toyota/tech/add/ Here is another link that
might interest you: http://www.brian894x4.com/Gearratiosanddiffs.html

--
Jarhead

"Jay Honeck" <[email protected]> wrote in message
news:[email protected]
| My '95 T100 (see my thread on "Restoring a T100") has "on the fly"
| four wheel drive that goes INTO 4 wheel drive okay, but won't come OUT
| of 4 wheel drive when I move the shift lever back to 2 wheel drive.
|
| It *will* revert to 2 wheel drive instantly if I put the truck (it's a
| 5-speed manual) in reverse.
|
| I suspect the 4 wheel drive has not been used much in recent years,
and
| is in need of "exercise" -- but can anyone interpret what's happening
| here from the symptoms I describe? Is this something I can fix? If
| so, how?
|
| Thanks!
| --
| Jay Honeck
| Iowa City, IA
| '95 T100 4x4 Extended Cab
| www.AlexisParkInn.com
| "Your Aviation Destination"
|



----== Posted via Newsfeeds.Com - Unlimited-Unrestricted-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 120,000+ Newsgroups
----= East and West-Coast Server Farms - Total Privacy via Encryption =----

 

[Guest]

On Sun, 07 Jan 2007 15:44:51 -0800, Jay Honeck wrote:

> My '95 T100 (see my thread on "Restoring a T100") has "on the fly"
> four wheel drive that goes INTO 4 wheel drive okay, but won't come OUT
> of 4 wheel drive when I move the shift lever back to 2 wheel drive.
>
> It *will* revert to 2 wheel drive instantly if I put the truck (it's a
> 5-speed manual) in reverse.
>
> I suspect the 4 wheel drive has not been used much in recent years, and
> is in need of "exercise" -- but can anyone interpret what's happening
> here from the symptoms I describe? Is this something I can fix? If
> so, how?
>
> Thanks!

My Toyota Tacoma is 2wd. My 4WD vehicle is a 1963 Willys Wagon with a
small-block Chevy conversion, so fair warning - I'm not really able to
give you the definitive answer on your T100.

That said, this sounds perfectly normal. Reversing unloads the
drivetrain, allowing the gears to come out of engagement with each other.

BTW shifing the Willys in a similar situation is like cold-welding steel
by muscular force alone, but at least it has Honest-to-John-Wayne
shift levers not some push button on the dash. <G>
--
Mike Harris
Austin TX

 

[Guest]

On 7 Jan 2007 15:44:51 -0800, "Jay Honeck" <[email protected]> wrote:

>My '95 T100 (see my thread on "Restoring a T100") has "on the fly"
>four wheel drive that goes INTO 4 wheel drive okay, but won't come OUT
>of 4 wheel drive when I move the shift lever back to 2 wheel drive.
>
>It *will* revert to 2 wheel drive instantly if I put the truck (it's a
>5-speed manual) in reverse.
>
>I suspect the 4 wheel drive has not been used much in recent years, and
>is in need of "exercise" -- but can anyone interpret what's happening
>here from the symptoms I describe? Is this something I can fix? If
>so, how?

The couplings in the 4X4 system get bound up by differential torque
between the axles - when you turn a corner the front wheels travel
farther around the circle than the rear wheels do. When you back up,
you reverse the process long enough for the couplings to pop free.

DO NOT even TRY locking the 4WD on dry pavement, period. The only
cars that can do that safely have 'All Wheel Drive' designs with a
center differential in the transfer case.

Save the 4WD usage or tests for loose dirt, gravel, sandy, muddy,
snowy, sloppy conditions ONLY, when the tires can easily slip some to
relieve the stresses. If the wheels can't slip and relieve that
stress and it builds up enough you WILL snap something - either
something cheap like a U-joint, or expensive like pieces inside the
transfer case, snapping an axle shaft or shattering a front locking
hub, or twisting a driveshaft like a piece of licorice.

--<< Bruce >>--