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Trouble with 4 low

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Old Dec 30, 2004 | 06:51 AM
  #1  
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Trouble with 4 low

I have an 03 SD CC 6.0 with the electric 4X4 switch. I have noticed lately that it seems to only go into 4 Low when it wants to. I have the truck in N and 4 hi then hit the switch for 4 low and sometimes it goes and sometimes it doesn't. Also a few times I had trouble getting it out of 4 low.

Any simple fixes for said problem?
 
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Old Dec 30, 2004 | 07:52 AM
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Trans in N. Foot on brake. Truck not moving. Flip the switch, wait a few seconds, and it should go in or out of 4Lo. If not, put it in gear, move the vehicle a foot, repeat the above.

If *that* doesn't work, something's broken. There are little motors on the transfer case to make the switch, and it's possible you have one that's on its way out. (But that's pretty rare; usually it's the hubs that have problems on the ESOF system!)

Duncan
 
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Old Dec 30, 2004 | 08:20 AM
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I think that may be it. I can't swear that I put my foot on the brake. I will check this and see if it cures my issue.

Edit:
That was it. I didn't realize there was an interlock between the brake pedal and the 4Low switch.
 

Last edited by Duksrule; Dec 30, 2004 at 08:24 AM.
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Old Dec 30, 2004 | 09:16 AM
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Originally Posted by Duksrule
That was it. I didn't realize there was an interlock between the brake pedal and the 4Low switch.
I think the reasoning is that they don't want you moving when all those big straight-cut teeth mesh, at what could be fairly mismatched speeds even at slow ground speeds. (Anyone who's ever driven an ancient 4WD vehicle, like the 1960 Land Rover I used to have, knows exactly how awful it sounds when you do that!) Foot on brake = no moving!

Duncan
 
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Old Dec 30, 2004 | 12:30 PM
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I have a 1 ton Chevy with a 205 in it and it needs to be able to move just a bit sometimes to get it all the way in low
 
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Old Dec 30, 2004 | 03:14 PM
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Also, on a manual trans, the clutch must be pushed down in order to go into low range.
mike
 
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Old Dec 30, 2004 | 04:34 PM
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I am just glad that I posted here rather than going to the dealer to look like a retard.
 
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Old Dec 30, 2004 | 04:50 PM
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No, I can't be...

I felt really dumb when I figured this one out...

I was having the intermittent engagement problem with 4 low. I got stuck once and couldn't get the truck into 4 low. Man was I mad. I felt like a huge moron when I realized I had to have my foot on the brake to make the 4 low engage. (of course this was after I had been pulled out, and 4 low probably wouldn't have done much for me anyway.) Duh.

Luckily I too figured it out before complaining to the dealer.
 
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Old Dec 31, 2004 | 08:50 AM
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Must be a VA thing :>)
 
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Old Dec 31, 2004 | 11:26 AM
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Rember that the peddel has to be pushed far enough to ingauge the switch,not just resting on the pedle.


Bob
 
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