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I see this post is old.. but in case anyone end up here having read this thread so far....
NO, disconnecting the battery and draining any residual charge from the vehicle electronic systems will not change or erase the non volatile FLASH TCM shift map.
Imagine your transmission having to relearn every time your battery fails.
The procedure noted in previous post requires a DRBIi or later programming tool, which displays those instructions to the user after being connected to the vehicles ODB port. the ODB scanners available at your local auto store cannot do this. A DRB tool costs around around $2K used. For about $200 worth of hardware. I'm not going to rant about that, bottom line is find a shop that has one and pay to have your TCM reflagged, which includes any relevant fw updates for your x-mission, plus the quick learn procedure, for about $100 I suppose. which is worth it to extend the life of these dodge slushboxes. the concept of the 41/2TE Ultradrives was ahead of its time, ruined by scrimping on component quality. I'd like to find out if anyone has reverse engineered the odb protocol to access the TCM, but it isn't trivial to do so, especially if any encryption or compression was used.
Originally Posted by ram-fjallasport
are you sure about this?
there is several requirements to this "mode", the manual say this:
To perform the Quick Learn Procedure, the following
conditions must be met:
² The brakes must be applied
² The engine speed must be above 500 rpm
² The throttle angle (TPS) must be less than 3
degrees
² The shift lever position must stay in PARK until
prompted to shift to overdrive
² The shift lever position must stay in overdrive
after the Shift to Overdrive prompt until the DRBt
indicates the procedure is complete
² The calculated oil temperature must be above
60° and below 200°
so if I just put the battery terminals together, all this is "ok"...?
the problem is still actual! Cause there should be possible to do this quick learn with superships or any tuner.
the reason is. when you tune yur car this will cause "wear out" for you r trans. then you rebuilt this and you need the quick learn.
OK, so some might disagree about this. you don't do the power change without using it, are you?
so, the only way to do the quick learn is to get a DRB III/starscan..
if anyone find a other way... please share with us!
had severe whip lash downshifts after putting in a aftermarket valve body. TCM Quicklearn from the Dealership took care of it.
I want to replace the valve body in a 2002 caravan 2.4l 124k miles...
I see that I could possibly get away without having too do the TCM relearn.
what did the dealer charge you to do the relearn?
I want to replace the valve body in a 2002 caravan 2.4l 124k miles...
I see that I could possibly get away without having too do the TCM relearn.
what did the dealer charge you to do the relearn?
I have a 04, with the 4.7, and the nv 4500 manual tranny.
She's old and tired, for the rebuild of the timing chain oil pump resealing etc...I have availability to a 5.7 hemi donor truck. Problem being is that the 5.7 is a automatic. They are both 4x4 and '04's.
ECM problems....? Any suggestions...recommendations....
Thanks fer lookin!
unfortunately, there is no easy trick to do a quick learn procedure. you would have to bring it to a dealership, or transmission shop to get it done. the DRBIII tool is about $5000-$8000 to buy, and you need a lot of training to use it.
you MIGHT be able to get away without getting one done though. but only if the transmission that was in there before this new one wasnt in too bad of condition.
let me explain to you what the quick learn procedure does exactly. your transmission uses the thickness of all the clutches inside as values. this tells the transmissions computer how and when to shift. so when a transmission goes bad, the clutches are usually very thin, and the transmission uses those values and compensates for them in the shifts. when you put a new transmission in though, the computer still uses the values of the last transmission. so the computer thinks it has very thin clutches, but it actually has brand new thicker ones. this can cause excess wear or slippage on your new transmission, thus the need for the quick learn. the quick learn is performed while driving at various speeds, and it allows the transmission to relearn all the the clutch thicknes values (CVI numbers) and then process how and when to shift using those values.
so like i said.. you dont HAVE to get the quick learn done. but you risk putting your new transmission through excess wear and tear.
I performed tcm relearn on 20 Ram 5500. No replacement just hard to move gear shift. So i did a tcm relearn. No codes. Now truck won't go over go over 45 mph.
Last edited by JoelHardwick; 04-14-2024 at 03:46 AM.
12-14-2013, 10:47 PM
