Question about 2001 Jeep Grand Cherokee
All time 4-wheel, 4.7 engine symbol of a "engine" light is on
You need to stop driving it at all and get it to a transmission shop. You have serious problems.
Posted on Jan 13, 2013
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Posted on Jan 02, 2017
I have a 2002 Jeep Liberty I had the same, there's a switch underneath the vehicle for the cable near the 4 wheel drive shaft, I had a transmission shop replace mine and that took care of the problem, I think the total cost was about $120.00 but that included labor.
Posted on Nov 29, 2008
SOURCE: 4 wheel drive won't work
There is a vacum powered actuator on the front differential housing on the passenger side. It gets it's vacum from two valves mounted on the firewall just behind the battery(to left). The white line feeds manifold vacum to the valves. Check for vacum at white line with engine running. If no vacum there is a break in line from manifold. If vacum check the pink and blue lines by applying vacum to each one. The vacum should hold. If not check lines from valves to vacum actuator. Most likely it will be the actuator. If both lines hold vacum check valves. Remove electrical connectors from both valves. Connect a wire from one of the terminals of the valve to ground. Touch a wire from the battery + to the other terminal of the valve. Listen for a clicking sound. If no sound valve is bad. Replace valves(s). If this doesn't lead you to the trouble it's probably a mechanical problem inside the differential. However most likely there would other noises.
Posted on Jan 08, 2009
SOURCE: 4 wheel drive doesnt work.
Has this Jeep been modified at all?
It sounds like the shifter cable was reinstalled backwards.
Specifically the 4-Low "Not Climbing Well". 4-Low should give you the best torque and hill climbing ability.
Do you feel any "Binding" in the steering wheel (difficult to turn)?
Remember a Jeep uses real driveshafts and differentials to give you 4WD - you cannot engage 4WD or 4-Low on dry hard surfaces. It needs a little bit of slip between the wheels for turns.
Check you're fluids too.
Posted on Jul 11, 2009
Four low is almost never used. I use it on very steep rocky or muddy trails in the woods or to pull someone out of mud or a ditch. Though some will shift standing still it is best do do this while rolling. Four high can be shifted at low speeds of 2 to about 35mph (higher also but not really good idea) Low can only be shifted between 2 to 10mph. If you find yourself stuck and unable to shift because you aren't rolling you can also turn the engine off, engage the transfer case and re-start. That avoids having the gears clashing together. Best rule is if it begins to grind, don't force it.
Posted on Jan 31, 2010
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