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Old 08-10-2011, 09:15 PM
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06 JGC-L Hard Down Shift and Crazy Idling

I have a 2006 4.7L V8 that has started to shift very hard when slowing down. The RPM's have also started to jump around when in park, actually causing it to shut off. The check engine light came on a couple of weeks ago and I figured it was the transmission. Had the code read and was told it was actually an Engine code...something about a vacuum leak. A week later, took my jeep in to a mechanic and they cleaned the throttle body...said there was a lot of buildup do to the mileage (103,000). Drove great for a week or so but it just started idling funny again and has down shifted very hard twice. Any suggestions would be greatly appreciated. Thanks.
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Old 08-11-2011, 06:47 AM
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Re: 06 JGC-L Hard Down Shift and Crazy Idling

You might want to re-post this in the WK forum to get more responses. This is for WK2's...2011 and newer.
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Old 08-11-2011, 02:58 PM
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Re: 06 JGC-L Hard Down Shift and Crazy Idling

Thanks. Obviously new to this site!
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Old 08-11-2011, 03:27 PM
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Re: 06 JGC-L Hard Down Shift and Crazy Idling

No problem and welcome.
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Old 08-11-2011, 03:29 PM
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Re: 06 JGC-L Hard Down Shift and Crazy Idling

Clean the throttle body or have a fuel system service performed.

Drain and refill transmission and flash/update the PCM.
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