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Old Oct 3, 2014 | 01:37 PM
  #1  
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No 4lo

When I shift into 4Lo I get no 4 wheel drive. 4Hi works. Did have a/c redirect to defrost a couple of times. I remember something about the air redirecting having something to do with not having 4x4 but don't know just what it was.
 
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Old Oct 3, 2014 | 01:39 PM
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Year and model?

Manual shifter or Shift on the Fly?
 
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Old Oct 3, 2014 | 01:40 PM
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I think it's all or none if it's a vacuum issue.

Did you have it in neutral when you tried to go into 4lo? You need to. Sometimes it takes a few seconds.
 
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Old Oct 3, 2014 | 01:52 PM
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JM96F250
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Originally Posted by seville009
I think it's all or none if it's a vacuum issue.

Did you have it in neutral when you tried to go into 4lo? You need to. Sometimes it takes a few seconds.
Yea, that's why I asked. Is it a manual shifter and just not shifting. Or are you shifting and front wheels aren't turning (are your hubs locked?)?

Shift on the fly, I have no idea on what is involved with that system.
 
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Old Oct 3, 2014 | 02:01 PM
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It's a 2001, auto,shift on the fly. Stopped in neutral waited and nothing. Don't even get the "low range" indicator light. 4 hi worked just not 4 lo.
 
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Old Oct 3, 2014 | 02:07 PM
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JM96F250
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Originally Posted by crazymut
It's a 2001, auto,shift on the fly.
Someone else will have to fill him in. I have no idea how those systems work.
 
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Old Oct 3, 2014 | 02:10 PM
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Mine has to be in neutral and foot on brake before it will engage
 
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Old Oct 3, 2014 | 02:56 PM
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I always stop, apply brake, put in neutral, and then select ether hi or low range, wait for actuation and go on my way. With low range it just would not engage, it went back to two wheel drive.
 
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Old Apr 26, 2015 | 01:48 PM
  #9  
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Found the problem. At the tranny there a shifting unit attached to the tranny. Where this unit attaches to the shaft there is as alignment mark on the shaft and another on the shifter. These marks were about 1/32 inch from lining up. Adjusted shifter and all is good now. Even my reverse lights work normally now.
 
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