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Discussion Starter · #1 ·
My Jeep is driving me crazy. This morning it would not engage any gears. The selector moves and it shows on the dash which gear is selected but nothing happens. There is a slight change in revs when going from neutral to drive etc but that is all. The selector shaft on the gearbox moves and selects properly. The gearbox oil is almost full. There is an error code(p 0513) that says incorrect skim key that has something to do with the immobilizer and the smart key. Could this have something to do with the gearbox not selecting gears?
Please help!!
 

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Italien MOPAR Guy :-)
Jeep GC HEMI / 300C
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My Jeep is driving me crazy. This morning it would not engage any gears. The selector moves and it shows on the dash which gear is selected but nothing happens. There is a slight change in revs when going from neutral to drive etc but that is all. The selector shaft on the gearbox moves and selects properly. The gearbox oil is almost full. There is an error code(p 0513) that says incorrect skim key that has something to do with the immobilizer and the smart key. Could this have something to do with the gearbox not selecting gears?
Please help!!

clean your shifter this can create diffrent issues.

Jeep Grand Cherokee Electronic Shift module cleaning video.wmv - YouTube
 

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2006 WK Overland
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Excellent video, sox! Hope I never have to do it, but it I do, this will make it easier. Thanks for taking the time to enlighten us all.
 

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Discussion Starter · #5 ·
Thanks for a gread video SOX. My gear indicators only have the brackets around the gear that is selected so I suppose that is not my problem. Any other ideas or suggestions?
 

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This morning it would not engage any gears. The gearbox oil is almost full. There is an error code(p 0513) that says incorrect skim key that has something to do with the immobilizer and the smart key. Could this have something to do with the gearbox not selecting gears?
First, I don't believe the Skreem module would cause your problem. I may be wrong, but I don't think the engine would stay running if this were the problem. It would run for about 3 seconds and then die. Next, how low is the fluid level? Have you just had the transmission serviced? If so, who did it and how long ago? What kind of fluid was put in? Were the filters changed? Once we know all this, then we may be able to make more "uneducated" guesses as to what may be going on.

My initial thoughts are (if the fluid level is correct) that the pump is sucking air and you're not getting enough line pressure to allow it to go into gear. Could be split side on the main filter, a plugged cooler return filter (if it's the original) or, if filters have been changed , the main filter improperly installed. Anyway, once we know the answers to the above questions, it'll help......hopefully!!
 

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Discussion Starter · #7 ·
First, I don't believe the Skreem module would cause your problem. I may be wrong, but I don't think the engine would stay running if this were the problem. It would run for about 3 seconds and then die. Next, how low is the fluid level? Have you just had the transmission serviced? If so, who did it and how long ago? What kind of fluid was put in? Were the filters changed? Once we know all this, then we may be able to make more "uneducated" guesses as to what may be going on.

My initial thoughts are (if the fluid level is correct) that the pump is sucking air and you're not getting enough line pressure to allow it to go into gear. Could be split side on the main filter, a plugged cooler return filter (if it's the original) or, if filters have been changed , the main filter improperly installed. Anyway, once we know the answers to the above questions, it'll help......hopefully!!
The fluid is just below the full mark. It has not been serviced in 20 000Km and the fluid was topped up about 5000Km ago with fluid bought from the agents. The transmission was functioning perfectly when I parked the jeep about two weeks ago.
 

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2005 Grand Cherokee
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sounds like it could be in need of the recall service. i believe this is one of the symptoms.

Defect: A transfer case electrical failure may result in an unintentional shifting of the transfer case into the neutral position.

Consequence: If the vehicle shifts into neutral, it may roll away increasing the risk of a crash or personal injury

I think if this were the case, you could go out and push the vehicle with it in the shift lever in the "park" position. May want to try it, and if you can move it, get the recall done. If not.....time to keep looking.
 

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Discussion Starter · #11 ·
Still no luck with the gearbox. I have this morning discovered that the gearbox oil level stays exactly at the same level when idling in drive, neutral, park and with the engine switched of. Could this be the result of a split filter?
 

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A couple things about fluid levels......if there is a converter "bleed back" overnight, the fluid level will be higher before startup than it was at shut down the night before. There is a check valve in the converter that, on some trannys, doesn't seal as well as it should. In most cases it is not an issue, unless it is real bad. Then it is just more annoying than anything else. The symptom for this is delayed engagement into any gear after sittiing a period of time. Then just let it idle in park for ~10-15 seconds before putting it into gear and it'll engage properly.

If you have a split filter (and not a bleed back issue) your fluid level will be about the same at shut down as it will be in the morning. After startup and idle (cold) it'll still be about the same. After driving a bit and heating up the fluid, the level will be somewhat higher, depending on the trans. temperature when it is checked. What happens with the split filter is that, instead of picking up all fluid, the pump is sucking a mix of air and fluid, or mostly air. This can cause no/low pressure and/or frothing of the fluid. Either of these conditions can cause the trans. to be very erratic, or not work at all. Also, an incorrectly installed main filter can cause the same symptoms as the split side on the filter.

You never did mention what was done (or who did the work) when the transmission was serviced 20000 km ago. My initial guess, based on your description of how this happened, is perhaps a split side on the filter. If it had been installed incorrectly, you would have had this problem from the get go, and not over 12000 miles later. You could also have solenoid pack or TCM issues. Is P0513 the only code showing? I would think that if the vehicle won't move, you'd be getting more codes too. In any case, when you begin troubleshooting, start with the easy, inexpensive stuff first.
 

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Discussion Starter · #14 ·
OK! I have found the fault, or at least I hope I have. The the pick up from the primary sump filter that goes into the oil pump came out with the result that the pump was sucking air. When I started to remove the filter I discovered that the filter was moving sideways at the front and that the filter retaining screw was loose. The pickup goes reasonably tightly into the seal on the oil pump so I can only guess that corrigations on dirt roads must have slowly vibrated it out over time?
 
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