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  #13  
Old 08-12-2009, 06:07 AM
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Re: Odd idle when shifting...

If you take the dip stick out of the fill hole..it clearly says on it.... DO NOT OVERFILL! So don't add any more fluid it its already full.

Mine does it too sometimes Marty, dunno why. Sometimes when mine comes to a stop the rev's will drop down from 600 rpm's to 400 rpm's and it'll just sit there an idle like that until I give it some gas, or start going again. Its done it since I've bought it, and its been serviced by the dealer just like yours has.
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Old 08-12-2009, 08:11 AM
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Re: Odd idle when shifting...

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Originally Posted by dreamer1213 View Post
If you take the dip stick out of the fill hole..it clearly says on it.... DO NOT OVERFILL! So don't add any more fluid it its already full.

Mine does it too sometimes Marty, dunno why. Sometimes when mine comes to a stop the rev's will drop down from 600 rpm's to 400 rpm's and it'll just sit there an idle like that until I give it some gas, or start going again. Its done it since I've bought it, and its been serviced by the dealer just like yours has.

I KNOW!!, I am working off information from a master technician who has diagnosed this problem many times. I haver personally done this to my own jeep and it fixed the problem, if you ask around the internet on other sites i am sure others have done it too.

1/2 to 3/4 of a qt of ATF+4 WILL NOT HURT ANYTHING!

---------- Post added at 09:11 AM ---------- Previous post was at 09:02 AM ----------

So are you saying that my jeep is going to randomly blow up now? I did this to my WK over a month ago after having alot of stalling and odd idle issues. I went to 3 different dealerships, 1 said Uh er, I dunno, the other two both hinted to add some tranny fluid.

I did it and its 100% perfect, no odd idle and no stalling and no exploding.
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Old 08-12-2009, 12:52 PM
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Re: Odd idle when shifting...

Thanks for all the helpful replies guys, much appreciated as always!

I must admit that I'm a bit pi55ed now tho. I followed the instructions on WJJeeps (bring engine/tranny up to normal temps, put it in P, idle for a min or two, check fluid), so I pulled out the dipstick and gave it a wipe, put it back in, pulled it out again and its BONE DRY!!!

Went inside and rang the dealer. He said their must be a leak and got a bit smutty when I said their no visible fluid underneath/on the box so I'd say one of your guys didn't do the job right... He said to bring it in and they'd take a look at it.

Now, he said that if it did overheat it would lock the trans in second gear and no damage could really be done - is he right???

I feel like suck an ass not checking this sooner but at the same time, you'd think a main dealer would be able to change some transmission fluid!

So, could any damage take place with it in its current state or would a sensor kick in and keep it operating safely. Aside from the funny idle, the shifting hasn't really changed any.....
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Old 08-12-2009, 06:33 PM
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Re: Odd idle when shifting...

Perhaps there is enough fluid in the tranny but just just not "enough" to get a reading on the dipstick.

Okkkkk Kyle....hold your horses there....I never said anything about anyone's Jeep blowing up....but if it worked for you, it might work for me. I might try it. I just usually listen to the do not overfill thing, because adding too much fluid is just as bad as not having enough fluid. But like you said...1/2 a quart probably isn't going to hurt anything....

I'll try it...and let you know if my weirdo idle thing goes away too...
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Old 08-12-2009, 08:37 PM
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Re: Odd idle when shifting...

Sorry, its been a long day and it started only minutes after i woke up this morning.
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Old 08-12-2009, 10:40 PM
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Re: Odd idle when shifting...

Not sure if this will work, but it solved a similar problem that I had on my WK. Call you dealer and ask them if there is a way to raise your idle or possibly flash your PCM. Good luck.
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Old 08-15-2009, 03:14 PM
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Re: Odd idle when shifting...

Just to give you all an update...

I visited the dealer this morning (had to go to the Mercedes section as the Jeep showroom was closed so I couldn't go ape at the guy ), so they got it up on the ramps and looked for leaks - thankfully none!

The tranny took an extra 1.5 quarts of ATF+4 tho. They changed both filters and didn't think they had to add more oil. They were adamant that if the level got critical the sensors inside the box would either throw a code or it would go into limp mode, which it didn't - they did check for codes etc...

I asked about overfilling the tranny by 1/2>1 quart and they strongly advised I didn't, the guy said that under 'demanding/hard' driving it could cause a pressure build up and something could get damaged...

Shifting seems a lot smoother and the idle seemed fine today so I'm happy.

Apologies for the long post, if you made it this far!
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Old 08-15-2009, 04:18 PM
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Re: Odd idle when shifting...

Thanks for the update Marty....I'm happy that it all worked out and that the Jeep is back to perfect running condition....

Good info that they say the advise against overfilling....
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Old 08-15-2009, 04:39 PM
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Re: Odd idle when shifting...

Thanks Hannes, hope your Jeeps runnin' sweet too!

I think I might take the TB off and give it a little clean just incase it is the IAC sensor that is causing the problem.
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Old 08-15-2009, 05:30 PM
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Re: Odd idle when shifting...

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Originally Posted by Martyp View Post
Thanks Hannes, hope your Jeeps runnin' sweet too!

I think I might take the TB off and give it a little clean just incase it is the IAC sensor that is causing the problem.
be careful with that. i took mine off and cleaned it and afterwards i noticed at idle my jeep would 'breath'. the idle would constantly go between 500-900 as i sat at a light. then on a road trip i had some crazy shifting issues, almost felt like it couldnt decide what gear to be in, its was kinda scary cause i was going 75, in cruise and all the sudden it would shift down to 3rd for half a sec then back up to 5th . then 75 miles away from home the cel light came on and said the TPS took a sh-t. got it replaced and works fine now with a smooth idle.
i didnt think that i got too much cleaner on the sensor but ya never know, just be easy with it and dont twist anything
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Old 08-17-2009, 02:47 PM
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Re: Odd idle when shifting...

I took my TB off, and cleaned all the deposits out....was super careful with the IAC sensor...and mine still does it....I just dunno...lol!
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Old 08-17-2009, 02:57 PM
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Re: Odd idle when shifting...

cough *add some fluid* cough cough.
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