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Unread 06-06-2011, 09:42 AM   #1
20Jeep03
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2003 KJ Liberty 
 
Join Date: Jun 2011
Location: Trussville, Al
Posts: 3
Automatic Trans downshifting problem

My Transmission downshifts real hard , second to first is the worse, trans does not slip otherwise is ok, upshifts ok.just when it downshifts its like "BAM"
any ideas ? changed fluid and filter.

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Unread 06-06-2011, 11:21 AM   #2
Joenavy85
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2005 KJ Liberty 
 
Join Date: May 2010
Location: Great Lakes
Posts: 83
read through this thread
http://www.jeepforum.com/forum/f28/1...noise-1220462/
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Unread 06-15-2011, 08:41 AM   #3
20Jeep03
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2003 KJ Liberty 
 
Join Date: Jun 2011
Location: Trussville, Al
Posts: 3
read that thread

Mine is not like that thread, It downshifts hard going from 3rd to second and second to first , no upshift problems......please help it has no transmission noise or gear noise
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Unread 06-15-2011, 05:47 PM   #4
TwoBobsKJ
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2003 KJ Liberty 
 
Join Date: May 2011
Location: Northern, OH
Posts: 583
Quote:
Originally Posted by 20Jeep03 View Post
Mine is not like that thread, It downshifts hard going from 3rd to second and second to first , no upshift problems......please help it has no transmission noise or gear noise
That is a common issue when a transmission is rebuilt, repaired or replaced and sometimes when there is a complete fluid flush and filter replacement. Jeep/Chrysler has a process called "Quick Learn" in which a scanner is connected to the OBDII port and the trans TCM is flashed to eliminate the hard downshifts. The flash can be done by a competent trans shop or a good mechanic who regularly works on transmissions.

Have you had any work done on the transmission? If so it may need a Quick Learn. If you haven't had work done try disconnecting the negative battery cable for 20-30 minutes, reconnect it then drive the Jeep. That may reset things back to normal.

My .02...

Bob
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Unread 06-16-2011, 06:01 PM   #5
20Jeep03
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2003 KJ Liberty 
 
Join Date: Jun 2011
Location: Trussville, Al
Posts: 3
I will Try that....

thanks
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Unread 06-16-2011, 07:57 PM   #6
richd
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2008 KK Liberty 
 
Join Date: Jun 2008
Location: Arizona
Posts: 1,107
Quote:
Originally Posted by 20Jeep03 View Post
thanks
You can try this method,its the easiest to do:

METHOD1:
1. Pull BOTH battery cables completely off of the battery !! - disconnect the cables totally from the Battery and bolt the
cables together - not the battery posts!! (or connect the cables together with jumper cables)
2. Turn the ignition key to the ON position
3. Stand on the brakes
4. Remain in this condition from 5-10 minutes to assure complete draining of all the capacitors in the entire electrical system!
5. Turn the ignition key off.
6. Connect everything back up again, reset your clock and stereo presets.
7. Take the car on the road and jump on it!!
8. Drive the car a little harder than usual for a day or two and you should notice the difference from then on.
I use to also take drive in the city and go through the gears when leaving a stop,do this several times,then take it on the highway,start slow speeds,then hit the passing gear a few times.Shut off vehicle then take a drive and see if it resets.
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