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Unread 01-14-2008, 08:06 PM   #1
SportTJ4x4
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42RLE Problems

Im having a major problem with my 42RLE its not shifting correctly and its causing my engine to ping alot. Ill be cruising at 55mph and then get to a hill once i start going up i slow down the transmission doesn't down shift or unlock the converter and then the pinging (rattling sound). Is there a chip or something i can buy to make this transmission down shift earlier, or anything I can do about this.


Thank you very much in advance,
Mike

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Unread 01-14-2008, 08:34 PM   #2
jeep rio
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They make shift kits for it, Im not sure of the manufacturer but I know they do! Also have you regeared it yet? and what size tires are you running
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Unread 01-14-2008, 08:47 PM   #3
nicolas-eric
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the 42rle in my 06 tj had some problems. it didn΄t like to switch the O/D off.
after a software update at the local jeep dealer evereything worked fine.
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Unread 01-14-2008, 10:01 PM   #4
SportTJ4x4
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Quote:
They make shift kits for it, Im not sure of the manufacturer but I know they do! Also have you regeared it yet? and what size tires are you running
im running stock 30s
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Unread 01-14-2008, 10:06 PM   #5
Unlimited04
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take it back to the dealership. i had similar problems and they reflashed the TCM, it helped alot. the tranny still sucks however, it still shifts into OD at 45mph, and i still lose speed and it spends all day kicking between 3rd/4th if i drive at 45mph, 40mph no problem, 60mph no problems, but anything in between, you just need to use the OD OFF button for when you know you want 3rd.
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Unread 01-14-2008, 10:09 PM   #6
SportTJ4x4
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Quote:
Originally Posted by Unlimited04
take it back to the dealership. i had similar problems and they reflashed the TCM, it helped alot. the tranny still sucks however, it still shifts into OD at 45mph, and i still lose speed and it spends all day kicking between 3rd/4th if i drive at 45mph, 40mph no problem, 60mph no problems, but anything in between, you just need to use the OD OFF button for when you know you want 3rd.

ok great thank you how much does taking it the dealer run you
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Unread 01-14-2008, 10:14 PM   #7
Unlimited04
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Originally Posted by SportTJ4x4
ok great thank you how much does taking it the dealer run you
i took it in three times, was free every time (did it under warranty). first problems started brand new, got fed up by 3k miles and again at 9k miles, and again at 20k miles. is it still under warranty? there is a TSB on the TCM module, so you should be able to make a case about it needing to be reflashed.
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Unread 01-14-2008, 10:29 PM   #8
SportTJ4x4
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Quote:
Originally Posted by Unlimited04
i took it in three times, was free every time (did it under warranty). first problems started brand new, got fed up by 3k miles and again at 9k miles, and again at 20k miles. is it still under warranty? there is a TSB on the TCM module, so you should be able to make a case about it needing to be reflashed.

my warranty has a 100 dollar deductible so was it totally free or did you have to pay the 100 bucks

thank your for all the help so far
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Unread 01-14-2008, 10:40 PM   #9
Unlimited04
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Quote:
Originally Posted by SportTJ4x4
my warranty has a 100 dollar deductible so was it totally free or did you have to pay the 100 bucks

thank your for all the help so far
i did it all before the 3/36k was up, so it was totally free.

they will probably charge you a diagnostic fee, and rape you with labor...but hey, they are the only ones that have the new TCM prog....
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Unread 01-15-2008, 09:41 AM   #10
SportTJ4x4
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So the only way is to bring it to the dealer? Nobody makes a chip or anything for it?
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Unread 01-15-2008, 11:16 AM   #11
SportTJ4x4
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Would this solve my problem? http://www.jeepforum.com/reviews/sho...hp?product=115
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Unread 01-15-2008, 12:19 PM   #12
chefdab
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The shift kit you referred to is made by Transgo.
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Unread 01-15-2008, 12:34 PM   #13
Unlimited04
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Quote:
Originally Posted by SportTJ4x4
So the only way is to bring it to the dealer? Nobody makes a chip or anything for it?
Read my previous post:

Quote:
Originally Posted by Unlimited04
they will probably charge you a diagnostic fee, and rape you with labor...but hey, they are the only ones that have the new TCM prog....
Quote:
Originally Posted by SportTJ4x4
The Transgo shift kit will help, but the tranny is still going to suck until you get the right program in the TCM. It will still cost you a hundred plus in labor to get that shift kit installed, unless you want to do it yourself.
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Unread 01-15-2008, 09:33 PM   #14
SportTJ4x4
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I brought the truck to my transmission guy to see what he thought, he said jeep made it that way to save gas. Im not so worried about the lack of power that i am about the engine ping. Is the engine ping coming from the engine being under so much load?
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Unread 01-16-2008, 03:42 PM   #15
garybattles
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I have the same tranny. Mine shifts to OD at 48 mph, but no pinging, and I run on 32's. Something else is causing the pinging. I also hit the OD off switch unless I am on the freeway.
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