help with 4x4

IJW84 · Jan 27, 2017

hi, I searched on here not finding an answer. I just wanna know what would cause the 4x4 not to work, its for a friends 2014 1500. shifting to 4x4 locked and in low not going, although sometimes all 4 will go in reverse when in low mode. what can I look at?

SilverStreak88 · Jan 27, 2017

What are you asking, it won't go into 4LO?

Tach_tech · Jan 28, 2017

There's about a hundred reasons why the 4x4 would fail. Getting codes read is the first step, with a proper scan tool.

chilliin · Jan 28, 2017

Could be a whole host of reasons. Could be anything related to the vacuum lines, vacuum sensor, hub seals or the switch on the dash.

Tach_tech · Jan 28, 2017

chilliin said:
Could be a whole host of reasons. Could be anything related to the vacuum lines, vacuum sensor, hub seals or the switch on the dash.

Hub seals,vacuum sensor/lines not applicable to OPs truck.

savage_46 · Jan 28, 2017

Could be the switch, front axle disconnect, module, wiring, t-case internal, shift motor. As others have said, knowing what codes are present will greatly help out.

IJW84 · Feb 2, 2017

there are no codes, its just 4x4 not engaging when shifted to 4lock or 4lo.
but i'llget some of what you guys suggested looked at.

thank u

RLJ10X · Feb 2, 2017

It's probably still under warranty.

Some times you're better off taking it to the dealership.

Tach_tech · Feb 2, 2017

IJW84 said:
there are no codes, its just 4x4 not engaging when shifted to 4lock or 4lo.
but i'llget some of what you guys suggested looked at.

thank u

If it's being commanded into either 4hi/4lo and it isn't achieved, there will be codes. You'll need a proper scan tool to retrieve them since they won't be in the PCM. The codes are your best friend to diagnose it.

jasonw · Feb 3, 2017

IJW84: Does he happen to have a 4 Auto button or mode on his 4x4, besides the lock and low? If so, then he has the 44-44 transfer case, which means it has clutches inside. 4 lock is not really 4 lock, it will only engage and stay in 4 lock when it feels slippage. Its a "smart" transfer case, so to speak, not the traditional "old school" style. Sometimes its slow to engage, especially if you try to "gun it" after putting it in that mode. With mine, sometimes I have to start slow, and/or turn the front wheels slightly to get it to engage quickly.

If no 4 auto button, then its the 44-45 transfer case, and something is definitely not right if its not engaging.

help with 4x4

IJW84

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SilverStreak88

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Tach_tech

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chilliin

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Tach_tech

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savage_46

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IJW84

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RLJ10X

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Tach_tech

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jasonw

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