TCC Tuning question for 730 ECM

[Shannen Durphey]

I don't doubt that the TCC is applying.  But Tim has said repeatedly
that changing one value in the calibration has no effect, and he
thinks something else is causing tcc apply.  I think he's probably
right.  Disconnecting the VSS will help isolate the inputs the ECM is
using to lock the TCC, and with that info you can go back into the
ANHT doc and try to determine what else to change.

Scanners and TCC do not always play well together.  The same is true
of scanners and E type transmissions.

Shannen

gcwestph at erols.com wrote:
> 
> Shannen Durphey wrote:
> >
> > Tim,
> >
> > Are you sure it's only a speed related TCC apply?   What happens if
> > you disconnect the VSS?
> > Shannen
> 
> I've seen the same thing in my '87 IROC and a friend's '91 Z28 using a
> scan tool while making 1/4-mile runs.  Watched it both in rpm and TCC
> lock-up command.
>
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