Question about 1999 Jeep Cherokee 4WD
Ok first u want to get a chrysler dealer not gm and second the main shaft in the transfer case may have been torqued and damaged, if this is the case then you are looking at a full rebuild of the internal main shaft, another consideration is that the only time the case changes power to rear wheels is when u shift into low gear other wise only one component moves to engage the chain for the front axle the other moving component changes the gear ratio for the whole transfer case,plus the shift linkage maybe stretched and need adjusted.
Posted on Jul 30, 2010
Everything on that transfer case is electronically monitored,actuated and controlled.There is a General Motors TSB (Technical Service Bulletin) about a particular switch on the transfer case that over time,accidentally engages the front differential at highway speeds and shreds the front diff.You might want to call your local GM dealer with the vehicle VIN number and have them confirm or deny any TSB's that might apply to your vehicle.Besides that,verify with all 4 wheels off the ground if the front diff is engaging when in 4 wheel low range.Scan the vehicle for diagnostic trouble codes,as the transfer case is controlled by a computer.If the 4WD is malfunctioning,any codes will lead you into the problem area.Many times,the transfer case controller is involved with the Body Control Module (BCM),and pulling codes from the Powertrain Control Module (PCM) will not put you in touch with the transfer case controller.On some Fords,the BCM controls the transfer case and also monitors things like the door open/closed sensors.If there is a malfunctioning door sensor,the BCM will inhibit 4WD operation electronically,so look in all areas.Good luck
Posted on Oct 02, 2008
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Posted on Jan 02, 2017
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