Do Not Shift light

[trautoranch]

-John,
Thank you for your reply. On the trans. test button where you check
for your code, there is no lights coming on. Have checked and
cleaned all battery
connections.
Best
regards,
Rick & Terri
M


In WanderlodgeForum@yahoogroups.com, John Suter
wrote:
>
> Rick and Terri,
>
> The "do not shift" light on a Allison transmission
> indicates one of the sensors has determined a "fault"
> significant enough to potentially cause damage to the
> transmission. That fault could be as innocent as "low
> sump temperature" or not so innocent.
>
> If it were to occur while the coach was in a gear,
> likely the transmission would lock itself into a
> single gear (the "limp home" feature) wherein you
> could drive to a safe location off the main highway or
> to the nearest repair facility. However, under that
> condition, were you to shift to, or through, Neutral,
> or shut off the ignition, the coach would not again
> enter a driveable gear and it could be "tow-truck
> time." (Some will add you could "re-boot" the
> transmission, but that action might eliminate the
> chance for repairs under warranty, and usually removes
> the codes from computer memory...)
>
> If the coach is not in gear (apparently your
> situation) there will be one or more "codes" recorded
> in the transmission control module memory indicating
> the source of the problem(s), providing you don't
> clear them, or re-boot before you "read them out."
> They are "read" by the series of red and amber light
> flashes, depending upon your model of Allison. As
> each Allison is slightly different I'd suggest going
> to the Allison site to download the "codes" or to one
> of our Forum friends here, to get a copy for your
> model. The Allison folks usually present seminars at
> the Rally in the Vally where they distribute the
> "code" information, and explain the details.
>
> There are other diagnostic methods to include the
> SilverLeaf software VMSpc which can be used should you
> want to explore it in the future.
>
> John Suter
> 2000LXi and prior PT40's
>
>
> --- trautoranch wrote:
>
> > She started just great then noticed "Do Not Shift"
> > light was on, on the
> > shift selector. Never seen that light before.
> > Looked in the blue book
> > and found no reference. Checked all the fluids and
> > jacks, but found no
> > problem. Has anyone had this problem before? Would
> > appreciate any
> > input. We were about to pull out for the Lone Star
> > BB rally.
> >
> > Rick & Terri McIntire
> > 1986 PT38 8V92
> > Patillo,
> > TX
> > Please Help!
> >
> >
> >
> >
>
>
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