Front drive shaft engaged
10-07-2012, 05:59 PM
#1
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Year: 1989
Model: Cherokee
Engine: 4.0 i6
Front drive shaft engaged
I have been test driving my jeep for other issues and I noticed the front diff was leaking and the front drive shaft is always spining. I checked to see if the fulltime and parttime lights work and they do when I put it into 4x4. When its in 2wd no lights are on but the shaft still spins. Thanks in advance.
10-07-2012, 06:46 PM
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Year: 1989
Model: Cherokee
Engine: 4.0 i6
The system is controlled by a vacuum motor and shift fork, actuated when the transfer case lever is shifted into one of the 4wd ranges. When disengaged, the differential is allowed to freewheel instead of turning the ring gear, pinion and front driveshaft, thereby saving unnecessary wear on these components during two wheel drive operation. ????
10-07-2012, 07:08 PM
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Year: 99
Model: Cherokee
Engine: 4.0
Oh.. You got an 89, they are vac operated, so if there are no issues with it i think everything should be normal. (On my 99) the from shaft spins, but no torque is applied. It's just free spinning. Hope I'm on the right track here.
10-07-2012, 08:18 PM
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Year: 1989
Model: Cherokee
Engine: 4.0 i6
Originally Posted by VTJeep
Oh.. You got an 89, they are vac operated, so if there are no issues with it i think everything should be normal. (On my 99) the from shaft spins, but no torque is applied. It's just free spinning. Hope I'm on the right track here.
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10-07-2012, 10:33 PM
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Year: 1990
Model: Cherokee (XJ)
Engine: 4.0
Being that you have full-time and part-time, that tells me you have a NP242 transfer case. All XJs equipped with that transfer case did NOT have a vacuum disconnect front axle. Therefore, everything is normal.
10-07-2012, 10:35 PM
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Year: 1989
Model: Cherokee
Engine: 4.0 i6
Originally Posted by cruiser54
Being that you have full-time and part-time, that tells me you have a NP242 transfer case. All XJs equipped with that transfer case did NOT have a vacuum disconnect front axle. Therefore, everything is normal.
10-07-2012, 10:38 PM
#12
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Year: 1990
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10-07-2012, 10:39 PM
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Year: 1993
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it is normal for it to spin all the time UNLESS you have vacum disco. if its vacum diso it wont spin in 2wd, and as far as the overheating on gear ratios your engine could possiabley be working harder on bigger gearing not too sure. wait for someone else to chime in
10-08-2012, 06:53 AM
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Year: 1990
Model: Comanche
Engine: 4.0 I6
Originally Posted by bloddy mud
it is normal for it to spin all the time UNLESS you have vacum disco. if its vacum diso it wont spin in 2wd, and as far as the overheating on gear ratios your engine could possiabley be working harder on bigger gearing not too sure. wait for someone else to chime in