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12-02-2008, 02:01 PM
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#1
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Registered User
Join Date: Oct 2008
Location: UK
Posts: 95
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Hi Guy's, I was wondering when Jeep started using adaptive computer controlled automatic transmissions like I read about in another thread?
Regards,
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12-03-2008, 05:39 AM
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#2
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Registered User
Join Date: Jan 2005
Location: ohio
Posts: 436
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i believe in 1994 with the 42re in the grand cherokee. but dodge was using it it way before with the introduction of the a604 in the minivans. anyone know if the aw4 in the xj is adaptive? mike
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06 kj 3.7l, 6speed manual, np241 command track
91 yj 2.5l, ax-5, np 231 3 inck lift, 31'' mud rovers
12 kk 3.7L, 42rle, mp1522, d-30, 8.25.
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12-06-2008, 02:17 AM
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#3
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Registered User
Join Date: Oct 2008
Location: UK
Posts: 95
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Does the adaptive trannsmision have some sort of memory or does it clear each time the vehicle is started and has a set learn time? I'm just wondering if it's worth clearing the unit,s memory on the used KJ I just bought?
Regards
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12-06-2008, 04:34 AM
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#4
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Registered User
Join Date: Nov 2008
Location: Los Angeles
Posts: 306
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What is an adaptive computer controlled automatic transmission and does the 2008 Liberty have it?
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12-06-2008, 09:06 AM
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#5
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Member
Join Date: Jan 2008
Location: America
Posts: 179
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All the 42RLE and 45RFE systems require adaptive learn since 1999 up to and incl the 545RFE - a simple reflash converts the early 4sp 45RFE to a 5sp 545RFE - the 42RLE is an adaptation of the FWD 4sp auto used with the V6 in the minivans - they are all fully TCM-controlled units, tho each will shift automatically thru two ranges for emergency limp-home mode - most can be reset to relearn by disconnecting the battery cable(s) for ~30mins - most higher mileage units will return improved shifting if the filter is changed with new transmission fluid, rather than the more lucrative back-flush method - check you owner's manual for maintenance schedules, incl fluid\filter changes - do not use their refiltered and cleaned fluid, as DCJ requires ATF4 for the totally electric transmissions, and DCJ gently suggests that it not be mixed with Mercon, Dexron, or previous versions of ATF, incl 3, or it will VOID YER WARRANTY!!!!!
Gentle enuff???
Use ATF3 or ATF4 as stated in your owner's manual - do not mix, and verify that on your service bill
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96 Dodge 3500 CTD, unseemly unstock
If it's a Diesel thing, I do understand....
'05 CRD; INMOTION ST-II; EDGE Trail; Pricol Boost, EGT, Rail Press, Trans Temp; SEGR; Provent; Magnaflow;
2.5" Daystar f, OME r; Al's arms, Moogs; Ranchos; Rubicons, 2.55 Gy's; Suncoast T\C, Transgo
'06 Cummins lift pump module, Fuel Manager\Filter, Filterminder
Four in a row really makes it go
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12-06-2008, 09:21 AM
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#6
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Registered User
Join Date: Mar 2002
Location: over the hills and far away
Posts: 120
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If I read your post right I can have my 45RFE reflashed to a 545RFE?Any advantages to that for my '02 KJ?Thanks.
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If it ain't broke'fix it 'til it is
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12-06-2008, 09:39 AM
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#7
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Registered User
Join Date: Nov 2006
Location: washington depot, ct.
Posts: 120
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Quote:
Originally Posted by XR
If I read your post right I can have my 45RFE reflashed to a 545RFE?Any advantages to that for my '02 KJ?Thanks.
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i have not done it but the two trannies are the same on the inside so i do not see why not. at most you would have two change the control module i would think. the trannies have 3 planitaries where most only have two. if you have the gears why not use them. many complain about the ratios chrysler choose to use but i am happy with them in my crd.
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12-06-2008, 03:02 PM
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#8
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Member
Join Date: Jan 2008
Location: America
Posts: 179
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The reflash allows additional combination of the multiple-clutch geartrain to get the second overdrive - the reflash is for the TCM - the transmission control routines for the gasoline-engined drivetrains are usually combined with the Engine Control Module, where the Diesel and the Grand Cherokees have a separate Transmission Control Module, so it may not be possible with the early KJ 45RFE -
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96 Dodge 3500 CTD, unseemly unstock
If it's a Diesel thing, I do understand....
'05 CRD; INMOTION ST-II; EDGE Trail; Pricol Boost, EGT, Rail Press, Trans Temp; SEGR; Provent; Magnaflow;
2.5" Daystar f, OME r; Al's arms, Moogs; Ranchos; Rubicons, 2.55 Gy's; Suncoast T\C, Transgo
'06 Cummins lift pump module, Fuel Manager\Filter, Filterminder
Four in a row really makes it go
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06-29-2009, 11:25 PM
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#9
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Registered User
Join Date: Jun 2009
Location: stockton
Posts: 5
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So would it work on a 2000 grand cherokee wj.
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06-29-2009, 11:29 PM
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#10
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Registered User
Join Date: Jun 2009
Location: stockton
Posts: 5
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I have a 2000 wj laredo w/ quadra drive and the regular 4.7 liter v8. I believe i have the dana 30 up front and the dana 44 out back. I heard that the reflash can be done and that it caused no major problems.
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06-30-2009, 10:27 PM
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#11
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Registered User
Join Date: Jun 2009
Location: Foothill Ranch, CA
Posts: 37
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I'm such a noob. What is adaptive transmission? I just bought a 2006 Liberty about 2 weeks ago with 44k miles. Should I disconnect the battery for 30 minutes? What would be the benefit?
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07-01-2009, 05:42 AM
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#12
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Registered User
Join Date: Nov 2006
Location: washington depot, ct.
Posts: 120
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Quote:
Originally Posted by rxmxsh
I'm such a noob. What is adaptive transmission? I just bought a 2006 Liberty about 2 weeks ago with 44k miles. Should I disconnect the battery for 30 minutes? What would be the benefit?
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the transmission records driver input and learns to shift accordingly. the transmission will pickup a new driver's habits and adjust to them. disconnecting the battery would just make it start from scratch whitch it might do anyway from just being turned off for a while.
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07-03-2009, 08:14 PM
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#13
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Registered User
Join Date: Jun 2007
Location: Arizona
Posts: 133
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Quote:
Originally Posted by scottunangst
the transmission records driver input and learns to shift accordingly. the transmission will pickup a new driver's habits and adjust to them. disconnecting the battery would just make it start from scratch whitch it might do anyway from just being turned off for a while.
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Yeah, because a transmission that did the SAME THING every time, or just had modes that did the same thing every time in that mode (sport, economy, offroad, tow)-- was just too hard for everyone to understand, so the geniuses had to make it try and read your mind and do something different and unexpected to you every time you use it... kinda like having a woman. I suppose when you do something wrong, it remembers that too, and brings it up again later.
At least with the transmission, when you are on the out and out, you can just unplug the battery and reset it to ground 0 (where it usually works the best anyway). It is kinda like chocolate and flowers. Reseting it is cheaper than a transmission relationship therapist or the transmission hitman, but it is not as satisfying as the latter.
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08-25-2009, 03:29 PM
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#14
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Registered User
Join Date: Aug 2009
Location: miami
Posts: 3
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shifting hard
I changed the fluid and filter in my '03 Liberty. I used atf +4 and a genuine Mopar filter. The tranny is a 42RLE. When I'm slowing down will shift hard. Should I disconnet the battery?
Last edited by santi2827; 08-26-2009 at 11:21 AM..
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08-25-2009, 04:06 PM
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#15
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Registered User
Join Date: Jul 2004
Location: Columbus, Ohio, USA
Posts: 1,430
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Quote:
Originally Posted by santi2827
I changed the fluid and filter in my '03 Liberty. I made sure I used atf +4 and a genuine Mopar tranny filter. The tranny is a 42RLE. When I'm slowing down just before a stop is will shift real hard. Should I disconnet the battery?
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YES 
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[B]JoBo[/B]
Columbus, Ohio USA
2006 KJ CRD [COLOR="Blue"]Atlantic Blue Pearl Coat[/COLOR][COLOR="Black"] Limited[/COLOR]
2000 Cherokee Classic with factory 16" wheels
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Adaptive Transmission?
