TRNW-2: 42rle never goes past partial lockup

[Steve Everett]

 Its going back together now,  my diag guy says he didn't do the EMCC reset
,   other than checking the vb thoroughly I also installed a Sonnax tcc
control valve and plunger,  never had to use one before, and it may not
have anything to do with this issue but figured I'd do it while I had it
apart,  after we test drive it I will probably hook up to it with my HP
tuners and see if I get any more data pids than we're getting with a SnapOn
and an Autel scanner

     Hopefully we'll get it figured out soon ,  when I do I'll post the fix
on the #1 mailer
Thanks for all the suggestions,
    Steve

On Wed, Sep 17, 2025 at 8:54 AM <jbockus at hiwaay.net> wrote:

> If the EMCC has been reset, You can go back with your scanner and undo
> it. We only do the VLP counter reset.
>
> On 2025-09-17 7:04 am, Steve Everett wrote:
> > There were no codes of any kind in the system, which is another
> > reason I assume the computer is commanding what is going on ?   I did
> > not do an emcc reset myself,  I'll have to ask the diag guy if he did
> > that prior to me getting involved in it,  to answer someone's question
> > I don't believe either scanner we used gave us the option of a tcc
> > slip speed ?  but I'll double check that after I get the valvebody
> > back on the vehicle
> >
> >    Steve
> >
> > On Wed, Sep 17, 2025 at 7:24 AM <jbockus at hiwaay.net> wrote:
> >
> >> Did you do the EMCC reset? I believe when you do, it won't go to
> >> full
> >> lockup until the torque converter clutch is "broke in", I quit doing
> >>
> >> this feature years ago because I figure most converter rebuilders
> >> are
> >> using a use clutch anyway? And I had converter shudder problems when
> >> I
> >> did it?
> >>
> >> On 2025-09-17 4:56 am, Steve Everett via trnw2 wrote:
> >>> I have an 05 Dakota with 42rle that I'm trying to solve this
> >> lockup
> >>> issue,  built by someone else , and has not been delivered to the
> >>> customer yet,  originally it was kicking in and out of partial
> >> lockup
> >>> randomly,  after driving it a couple times we decided to unplug
> >> the
> >>> alternator as it had recently been replaced,   that stopped the in
> >> and
> >>> out of lockup,  installed a new alternator, no more in and out of
> >>> lockup issues,  but it never goes into full lockup , no matter
> >> what
> >>> speed , driving on level ground ,  50-60mph,  stays in partial
> >> lockup
> >>> and we can feel and hear the lockup groaning,   desired matches
> >> actual
> >>> lockup apply on the scanner,  its like the computer isn't telling
> >> it ,
> >>> or letting it go to full lockup ?
> >>>
> >>> I had them pull the valvebody and I checked it over, all
> >>> checkballs correct,  solenoid switch valves replaced using the
> >> transgo
> >>> valves,  new dealer solenoid assembly,   I'm kind of at a loss on
> >> this
> >>> one,  I wanted to replace the tcc reg valve, but the only option
> >> is a
> >>> Sonnax oversize and I don't have access to the reamer for that
> >>>
> >>> This post from years ago describes exactly what this one is
> >> doing,
> >>> but there are no tsb's that apply to this vehicle
> >>>
> >>>
> >>>
> >>
> >
> https://www.trnw.net/trnw/fixdata.php?input=42RLE&aname=17558&confirmed=no&threadID=42RLE-32&cat=tcc#tcc
> >> [1]
> >>> [1]
> >>>
> >>> Steve
> >>>
> >>> Links:
> >>> ------
> >>> [1] https://www.trnw.net/trnw/fixdata.php?input=42RLE#content
> >>> This message was sent from the TRNW Technical Discussion Forum
> >> (trnw2).
> >>> You were sent this message because you have subscribed to our
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> >>> TRNW Inc., 2825 Walnut Terrace, Modesto, CA 95355
> >
> >
> > Links:
> > ------
> > [1]
> >
> https://www.trnw.net/trnw/fixdata.php?input=42RLE&aname=17558&confirmed=no&threadID=42RLE-32&cat=tcc#tcc
>
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