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Old 06-10-2010, 08:46 PM   #1
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Question Automatic Jumping Out Of Gear

Need help from the team. I have a 2005 TJ with only 28k on it. The jeep is like new and has always been babied. Enough of that and here is the story problem. About 500 miles ago the TJ started jumping out of gear. I leave my home, travel about 10 minutes to the freeway, after going 10 to 20 miles, traveling about 60 to 70 mph, the tranny will jump out of drive, I let off the gas, the tranny will re-engage and on I go. I travel on into town, make my stops then travel on home with no tranny issues. This has happened several times in the last 500 miles only at the beginning of the trips. All oil levels are fine, fuses are ok, wiring connections seem tight. Under the jeep looks new with no oil leaks.
Could it be a solenoid ?

Thanks for you time

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Old 06-10-2010, 09:09 PM   #2
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Could be something electrical and most likely is. Automatic transmissions don't really jump out of gear, but slip due to not enough pressure being created by the transmission pump. Being as new as your Jeep is it is most likely an electrical problem. You could try some transmagic as that is a good product that helps with slippage. There is a plug where you can run a diagnostic on the tranny. Go to an autoparts store and ask them to use their code reader.

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Old 06-10-2010, 09:28 PM   #3
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^^^ x2 Check for codes...

Did anything ever happen to it? Did it have a hard time pulling a trailer or a stuck 4x4 and slip alot to glaze parts? Did it ever get used a by a teenager for brake torq'ing around 500 miles ago??? Let us know if anything odd happened, it may lead towards the source of the issue.
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Old 06-10-2010, 09:57 PM   #4
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I think I'm misunderstanding. Do the rpm's go high when it should upshift, and shift when you let up on the gas? Or do they drop like you shifted to No Gear?

At 28k...you're about due for a trans flush and new filter anyway. I'd go ahead and do that now.

It also sounds to me like it acts up when warm. Are you noticing any hard shifts or weird torque converter engagement? It almost sounds like the transmission is getting a little hot.
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Old 06-10-2010, 09:58 PM   #5
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The TJ has never been abused. It is more of a pavement queen. It has never been driven hard, only in 4x4 a few times on the pavement. The tranny shift like it should, no slipping and responds to forward and reverse. I never gas it hard when taking off from a dead stop. It just wants to jump out of gear at a higher rate of speed, 60 to 70 mph. I don't recall the tranny jumping out of gear at any lower speeds. Once it pops out of gear, and letting off the gas quickly, it's goes right back into gear very quickly. Adult driven only - hope this helps

Thanks again for your input
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Old 06-10-2010, 10:14 PM   #6
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Ok. Get the fluid and filter replaced as soon as possible. You MIGHT have a clutch sticking a little bit. The pressure inside the trans is a little off for some reason. Before I jump to conclusions though, verify that the fluid is indeed full. Autos are picky about fluid level and type.

If it's full, get a trans flush and new filter. Get a good fluid too. While the shop is playing with it, have them check the transmission codes like others have suggested. I'm really leaning toward that fluid being wore out. It may look and smell good, but it won't for another 10k miles. I think it got hot at some point. Not enough to overheat, but just some elevated temps. I'm thinking some fresh fluid and a filter will correct your problem.

If not, I think it's a clutch sticking and disrupting fluid pressure. You can try additives to help, but if that fails you'll need a rebuild. As of now, I don't believe that's the case though.

It's possible also you torque converter is acting up. The code reader should detect this or you'll hear it making noises in OD
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Old 06-11-2010, 08:31 AM   #7
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Thanks so much for all the input. I will let you know once fluids are change and codes are check.
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Old 06-11-2010, 11:14 AM   #8
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Quote:
Originally Posted by GroundHawg View Post
I think I'm misunderstanding. Do the rpm's go high when it should upshift, and shift when you let up on the gas? Or do they drop like you shifted to No Gear?

At 28k...you're about due for a trans flush and new filter anyway. I'd go ahead and do that now.

It also sounds to me like it acts up when warm. Are you noticing any hard shifts or weird torque converter engagement? It almost sounds like the transmission is getting a little hot.

I am with GroundHawg. I realy don't understand what you are indicating or what your are trying to discribe by saying "jump out of gear". "It just wants to jump out of gear at a higher rate of speed, 60 to 70 mph"


Is it slipping (are the rpms going up) without a change in speed when you press the gas?
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Old 06-14-2010, 10:23 PM   #9
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I guess I'm not explaining the issue to good. Yes while traveling down the freeway at 60 to 70 mph, with the shift handle in drive and staying in drive, the tranny will pop into a neutral mode, I will quickly let off the gas, and then apply the gas pedal and everything is back normal and on I go down the road. The tranny does not slip, very well taken care of and adult driven only by myself
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Old 06-14-2010, 10:55 PM   #10
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That actually does sound like it is slipping due to lack of pressure by the transmission pump even if it has been driven carefully something may be defective.
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Old 06-15-2010, 05:16 AM   #11
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Sorry but you still are not explaining.

What is the indication that you believe in in netural as you say? The vehicle starts slowing down? (that would be slipping)

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