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Old 07-18-2010, 12:36 AM
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Dodge Ram Forum Senior Member
Join Date: Jun 2010
Location: Central Illinois
Posts: 132
Gender: Male
Vehicle: '99 Dodge Ram 1500 4x4
Trim Level: Sport
Color: solar yellow
Engine: 1998-2001 360ci (5.9L) Magnum V8 245hp(standard), 250hp(Sport package)
Rep Power: 5
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Default vacuum to front axle

I have a problem with my '99 5.9L 4x4. The 4WD shifter pops out after a few seconds, both 4HI and 4LO. I understand that I should check for vacuum at the front axle but could someone please explain how to do this? I have a vacuum gauge but should it pull a certain amount of mercury? Does the truck need to be in gear and in 4WD (both axles off the ground), do I check at the axle or the transfer case? If I have vacuum, what next?
Tough part is, I have no way to test it right now. No snow and no mud (no rain), just dry pavement and gravel roads.
Thanks everyone,
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