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Unread 08-03-2011, 09:03 PM   #1
JHoffman369
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Need some expert advice?

Every once in a while when I'm driving and have my cruise set my jeep will kick down into a lower gear and then back to cruising gear...doesn't happen all of the time, maybe once a week, possibly even less than that? Any ideas on what it might be? I'm swapping out all of my plugs this weekend and will be changing my fuel filter in the coming weeks as well. Any help would be greatly appreciated.

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Unread 08-04-2011, 07:00 PM   #2
JHoffman369
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Unread 08-04-2011, 07:09 PM   #3
tbone1004
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may be set at a weird speed where it's inbetween gears. Try upping the cruise a mile an hour or two and see if it does that. May be time for a tranny flush too
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Unread 08-05-2011, 08:41 PM   #4
JHoffman369
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That's what one of my buddies said too. I tried upping it 1, 2, even 5 mph before and that didn't do the trick.
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Unread 08-05-2011, 09:27 PM   #5
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Unread 08-05-2011, 09:34 PM   #6
the88thpianoman
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TPS could be the culprit as well.
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Unread 08-06-2011, 07:26 AM   #7
JHoffman369
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ok...not a "car guy" barely at all so I'll do my best to look around and see what/if I can find. Thanks for the input
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Unread 08-06-2011, 07:48 AM   #8
michiganmaveric
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Mine does this all the time. I have the 4.0 with bigger tires and 3:55 gears. I just do not have enough power to get up some inclines/hills and ti will downshift out of overdrive to get up the hill. Also could be fuel filter related.
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Unread 08-06-2011, 07:59 AM   #9
blazepsi
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Changing my Fuel Filter Helped me with that Issue...
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Unread 08-06-2011, 12:13 PM   #10
billzcat1
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Mine would occasionally do this as I started up hills with cruise on around 70mph, it would kick down to 2nd for a could seconds and then kick back to third. This was with the 4.7HO/545RFE, a LOT of gear, and driving at 4000-12000' altitude (mostly in the 6-8000 range). I found that if I hit the OD off button just as I hit the base of the hill it wouldn't do it nearly as much. Likewise, I also reduced it a lot by running premium fuel. Around sea level, I do fine on regular fuel/87 oct, but with the high load and high altitude it was really down on power.

If yours is doing it during low-load situations then there is something wrong. I would check the tranny fluid level, do the tune-up and consider replacing the TPS.
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