TRNW-2: 4L60E 3-4 shift time error

[Steve Everett]

   I would expect shift times to be around .35 to .40,   the .9 seems way
too long in my opinion.   if its got 150k or more on the miles it needs a
new Delphi or AC Delco mass air flow sensor,  that will shorten up the
times,  if you want to verify it,  just unplug the MAF and then drive it
and see how the shifts feel ?

   Steve

On Fri, Dec 19, 2025 at 2:29 PM Healy Powertrain via trnw2 <trnw2 at trnw.net>
wrote:

> Hello Group!
>
> Is it normal for a MY2007 (ISS) 4L60E to have the 3-4 Shift Error Value
> match the Shift Time Value (The Error Value being negative) All the time?
> And for the 3-4 shift to complete in up to 0.9 seconds? (Varies from ca
> 0.3 to 0.9 seconds)
> I was diagnosing this unit for a 3-4 shit complaint (It did shift to 4th
> just barely noticeable)
> Thanks,
>
> Best Regards,
>
>
> Marcel Verwijmeren
> Healy Powertrain
> Driveline Solutions
> T 06 57745407
> E info at healypowertrain.com
> W www.healypowertrain.com
>
> [image: Merry Christmas GIFs - Find & Share on GIPHY]
> This message was sent from the TRNW Technical Discussion Forum (trnw2).
> You were sent this message because you have subscribed to our mailing list.
> If you don't want to receive these emails from TRNW in the future, please
> unsubscribe here:
> https://www.trnw.net/unsubscribe.php?forum=2
> TRNW Inc., 2825 Walnut Terrace, Modesto, CA 95355
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.trnw.net/pipermail/trnw2/attachments/20251219/077706df/attachment.html>