Thread: 4x4 vac leak?
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Old 06-21-2013, 11:22 AM
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They both supply vacuum. One engages the other disengages. Almost like a negative vacuum, but not quite. Check the vacuum at the TFC and see if it's working there. If you have a hand vacuum pump you can test the line to the front with that.

If you have a few feet of vacuum line (even some old air shock line but something that won't collapse, brake line etc...) you can trace it from the transfer case (driver's side) and solve the issue if there is a leak.
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