TRNW-2: 68RFE Is there a way to reprogram Trans on a deleted PCM

[Richard Wardell]

I just say no.  No to anything over 1500 series.  No to anything lifted
more than 3 inches.  I have 4 1/2 years left.  No to anything that is not
easy and profitable.

Richard Wardell


On Sat, Mar 22, 2025, 7:50 PM Chris and Cathy Kershaw via trnw2 <
trnw2 at trnw.net> wrote:

> Really depends on the deal made in the beginning. Did he sneak in or did
> the shop let him in?
>
> If he said build me a hot rod unit and you agreed not understanding what
> that meant you’re kind of stuck with that deal. Might mean pulling at
> upgrading some things, if he’s reasonable you’ll at least get paid for
> additional hp parts on that.
>
> If he said it’s *just deleted*, little baby fuel mileage tune, he’s
> stuck. In that latter case I’d require removal of the power knob, tuned for
> stock hp and no trans tune, otherwise no warranty.
>
> I’ve also given a customer or 2 their money and their keys back. Sometimes
> it’s just not worth the fight.
>
>
> On Fri, Mar 21, 2025 at 10:13 PM tucker tuckertrans.com via trnw2 <
> trnw2 at trnw.net> wrote:
>
>> Group,
>> I have a 2020 68RFE that has 80,000 and burnt the ODs up shortly after
>> the def was deleted.  We rebuilt the transmission and noticed the Desired
>> Line PSI commanded 170 in Drive at a WOT stall.  I've been told anything
>> over 160 suspect the transmission has been tuned.  When we rebuilt it we
>> added a Transgo OD pressure plate to up the clutch count.  We Sonnified the
>> pump with TCC valves that were worn, and did our normal OH that included a
>> Sonnax swtich valve ream.  Anyway with it back in the truck we notice this
>> truck is loaded with HP.  It has a knob on the dash that has 1-5 setting,
>> and on the 5 it is way more HP that I feel our transmission can take.  It
>> also seems the shifts are too quick.  I wish I could just program it back
>> stock, but that would mess up the delete.  So what are you guys doing in a
>> case like this?  Is there a way to program the TCM part of the PCM back to
>> stock?   This being a 2020 doesn't the PCM has to be unlocked to tune or is
>> that just and HP Tuner way?  Does anyone have a clue what programming uses
>> a rotary knob that has 5 settings?  I try to avoid these type jobs, but
>> this one slipped in on us.
>> Dan Tucker
>>
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>
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