SOURCE: clunk in 4x4 1998 f150
Start by checking the axle half shaft u joints and then the drive line u joints for worn or loose end caps. Also if you have a constant velocity joint on the front drive line make sure the centering ball and socket are not worn. Most people never grease this item and by the time you figure it out it's too late.
SOURCE: clunking when you engage the 4x4 when you
sounds like the transfer unit is going bad check level of oil in the case if burnt then you know what it is if ,it's not burnt check the front axel to see if it is leaking
SOURCE: 97 expedition - 4x4 does not engage
the first thing i would check on any 4x4 AWD is to see if the vacume lines
were conected to the transfor case and getting vacume when engaded i have found this to be the
most commen answer
4X4
On
these issue, there are few solved help links for troubleshooting the
issue easily.-------
Click
the link below: ---
http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html
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http://schematicsdiagram.blogspot.com/2012/01/4x4-truck-makes-roaring-noise-in-front.html
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http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html
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http://repairhelpcenter.blogspot.com/2011/12/no-4x4-light-on-dash.html
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http://technoanswers.blogspot.com/2012/01/4-wheel-drive-system-will-not-disengage.html
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http://schematicsdiagram.blogspot.in/2012/02/4wd-light-is-flashing-and-beeping-no.html
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http://technoanswers.blogspot.in/2012/06/2002-jeep-wrangler-4wd-idiot-light-is.html
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Traction
control switch will not engage on 4WD High or Low
http://whoisbyme.blogspot.com/2012/10/traction-control-switch-will-not-engage.html
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4WD light
flashing and 4WD will engage after few minutes
http://repairhelpcenter.blogspot.com/2012/10/4wd-light-flashing-and-4wd-will-engage.html
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http://technoanswers.blogspot.in/2012/05/2008-toyota-tundra-4x4-wheel-drive.html
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http://technoanswers.blogspot.in/2012/02/4x4-front-differential-will-not-engage.html
-------
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http://technoanswers.blogspot.in/2012/09/dodge-ram-4x4-light-keeps-flashing.html
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http://technoanswers.blogspot.in/2012/02/ford-4x4-front-wheels-will-not-engage.html
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These
details will help.
Thanks.
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