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more vacuum problems,any ideas

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Old Jan 7, 2011 | 07:30 AM
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more vacuum problems,any ideas

driving down the road heater goes from floor to defrost and back, and this morning had to use 4 wheel drive and the hubs would lock and unlock
 
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Old Jan 7, 2011 | 08:40 AM
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Welcome to FTE.

Start by looking at the vacuum lines going to the front hubs to see if you see any cracks/broke lines. The fan will default to the defrost if you have a vacuum leak.
 
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Old Jan 7, 2011 | 09:36 AM
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It could also be the seals inside the hubs, but in this case maybe not since the truck did seem to lock the front hubs.
 
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Old Jan 7, 2011 | 01:49 PM
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thanks will start looking
 
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