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1991 4runner 4WD question



 
 
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  #1  
Old December 30th 04, 12:21 AM
thom
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Default 1991 4runner 4WD question

I just recently bought a 91 4Runner with the automatic A340H
transmission. I can't find a definitive answer on the web about this,
so I thought I'd post here.


Is the 4WD system on this vehicle shift-on-the-fly, or do I need to
stop/slow down significantly first?

I had a Wrangler, you could engage at up to 55mph for 4WD hi.

Please respond with the allowable shift speeds for both 4WD hi and 4WD
lo if you know them.

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  #2  
Old December 30th 04, 03:22 AM
Roger Brown
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Default

thom wrote:
>
> I just recently bought a 91 4Runner with the automatic A340H
> transmission. I can't find a definitive answer on the web about this,
> so I thought I'd post here.
>
> Is the 4WD system on this vehicle shift-on-the-fly, or do I need to
> stop/slow down significantly first?
>
> I had a Wrangler, you could engage at up to 55mph for 4WD hi.
>
> Please respond with the allowable shift speeds for both 4WD hi and 4WD
> lo if you know them.


4Hi<->4Lo generally requires the vehicle be stopped or very slow speed.

If you have the Automatic Disconnecting Differential (ADD) front axle,
http://www.off-road.com/toyota/tech/add/index.htm
then I think 50MPH is the max. 2Hi<->4H shifting speed. Your Owner's Manual would have the exact specs. You might try asking
on the Yotatech web forum:
http://www.yotatech.com/forumdisplay.php?f=2
Lots of 2nd gen owners hang out there.

--
Roger
 




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