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My 1991 ramcharger will not engage in to 4x4...? What can it be?

  • vaccume?

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  • accuater?

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The CAD needs vacuum, T-case switch is bad or the CAD is rusted/stuck.  :-\

Check your vacuum line at the CAD with it in 4x4 and the engine running. See if it's getting any vacuum. If not trace it back and look for broken lines disconnected lines.

If you have vacuum you will need to pull the CAD unit and see if it's stuck.
 
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