- #1281 of 1833
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Re: Another hard down shifting problem [captainibc]
by shipo
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Feb 25, 2007 (1:46 pm)
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Replying to: captainibc (Feb 25, 2007 1:24 pm)
While I've never experienced the "Bump Shift" thing occurring after a fluid change, any number of folks have, and in most cases the response from the dealership/transmission shop is that the TCM signaled "Loss of Prime" (happens on some oil changes and not on others, no explanation as to why). There are two ways of clearing the error, 1) disconnect the battery for some period of time (I don't remember the exact interval, however, I'm sure an hour would be more than sufficient), or 2) have your friendly neighborhood dealership/transmission shop trigger a reset inside of your TCM.
I hope this helps.
Best Regards,
Shipo
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- #1282 of 1833
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Re: Another hard down shifting problem [shipo]
by captainibc
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Feb 25, 2007 (3:51 pm)
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Replying to: shipo (Feb 25, 2007 1:46 pm)
Thanks Shipo. You've pointed me in the right direction...I hope! I'll disconnect the battery for at least 1 hr. If this does not help I'll bring it to my dealer/transmission shop. Thanks again.
Regards,
Captain IBC
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- #1283 of 1833
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Cruise Control Problem
by tsguru59
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Feb 28, 2007 (11:43 am)
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When driving with my cruise control on the transmission will jump in and out of overdrive. It only does this when I have the cruise control on.
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- #1284 of 1833
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Re: Cruise Control Problem [tsguru59]
by shipo
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Mar 01, 2007 (7:00 am)
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Replying to: tsguru59 (Feb 28, 2007 11:43 am)
First off, you are most likely not changing gears (or overdrive gears) at all, what you are experiencing is the torque converter locking and unlocking.
Second, depending upon the terrain, the incline (or decline) of the road, your vehicle speed, the load you're carrying and the engine and transmission installed in your van, your transmission should lock and unlock the torque converter. Now, if you are tooling down the freeway at 65 mph, and the road is flat, and you have little load, and you have either the 3.3 or the 3.8 liter engine, then your transmission should lock the torque converter and keep it locked.
Best Regards,
Shipo
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- #1285 of 1833
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Re: 2005 Town and Country 3.8L Transmission fluid change?? [97xpresso]
by mudra
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Mar 01, 2007 (7:37 am)
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Replying to: 97xpresso (Feb 17, 2007 2:32 pm)
Well, I am in East Brunswick,NJ and the lowest any dealer around here has quoted for a Flush is $200 + tax. I called up PepBoys and discussed the issue with their Service Manager . They did a flush with ATF4 under warranty. Thanks, everybody for your helpful suggestions.
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- #1287 of 1833
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Re: 2005 Town and Country 3.8L Transmission fluid change?? [mudra]
by shipo
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Mar 01, 2007 (7:49 am)
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Replying to: mudra (Mar 01, 2007 7:37 am)
Where'd they get the ATF+4 from? 
Best Regards,
Shipo
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- #1288 of 1833
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Re: Another hard down shifting problem [shipo]
by captainibc
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Mar 01, 2007 (12:33 pm)
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Replying to: shipo (Feb 25, 2007 1:46 pm)
Thanks so much for your advice on my fluid change problem. I did the disconnection of the battery overnight...that didn't work. Today I brought the van back to the guy who changed the fluid & filter. He called someone at Chrysler that he knew (as you suggested) and explained the problem. Chrysler said that the transmission needed to be re-programed with the "quick learn program" because the TCM sensed loss of pump pressure. I returned to Chrysler, had it re-programmed and all is well. Thanks so much for your help.
Captain IBC
PS...$52.99 (1/2 hour labor to do the program)
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- #1289 of 1833
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Re: Another hard down shifting problem [captainibc]
by shipo
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Mar 01, 2007 (2:02 pm)
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Replying to: captainibc (Mar 01, 2007 12:33 pm)
Great, glad it all worked out. 
Changing the transmission fluid (on our Caravans) is one of the very few things that I don't do myself for this very reason. I think my dealer charges just over $100 for the tranny service, TCM reprogramming included. 
Best Regards,
Shipo
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- #1290 of 1833
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Re: Another hard down shifting problem [captainibc]
by john120561
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Mar 02, 2007 (8:14 am)
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Replying to: captainibc (Mar 01, 2007 12:33 pm)
Wow! I have been looking for the answer to this same situation in my Caravan tranny. Dealer said he can't feel any thing wrong. You described it perfectly. I have an appointment at the dealership to do what you had done. Thanks for taking the time to share your info. Dealers do not know everything, in fact, I think we know our cars better then they do at times; we drive them! Again thanks for the info.
ZZjohnie
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