TRNW-2: 42rle never goes past partial lockup

[Fred Whitaker]

 Is there an option on the scanner to deselect converter learn?
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From: trnw2-bounces at trnw.net <trnw2-bounces at trnw.net> on behalf of Steve Everett via trnw2 <trnw2 at trnw.net>
Sent: Wednesday, September 17, 2025 4:56 AM
To: Technical Discussion Forum <trnw2 at trnw.net>
Subject: TRNW-2: 42rle never goes past partial lockup

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<https://www.trnw.net/trnw/fixdata.php?input=42RLE#content>

   Steve
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