TRNW-2: 42rle never goes past partial lockup

[Chris and Cathy Kershaw]

I think these always say partial on the scanner. If desired and actual
match it’s working as designed in my experience. If someone did the emcc
reset it will take a while, couple hundred miles, to start locking up like
normal again.

On Wed, Sep 17, 2025 at 7:24 AM jbockus--- via trnw2 <trnw2 at trnw.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]
> >
> >    Steve
> >
> > Links:
> > ------
> > [1] https://www.trnw.net/trnw/fixdata.php?input=42RLE#content
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