Re: Tuning question for 730 ECM

["D. Barry Stubbs" <z24man@earthlink.net>]

timsiford@hushmail.com wrote:
> 
> >Are you sure it's only a speed related TCC apply?   What happens if
> >you disconnect the VSS?
> 
> I'm pretty darn sure.  However, let me give credit where credit is due.
>  Greg Westphal and Jeff Fox discovered this.  I confirmed it.  Using a scan
> tool the TCC apply happens at a particular mph.  This is a mandatory lockup
> and the anht_hac.pdf confirms the mph.  TCC applies, RPMs drop, and MPH
> keeps increasing.  Funny thing is ... Diacom doesn't report the TCC apply.
>  Greg and Jeff found it using an OTC scanner (I think).  Furthermore, Greg
> installed a TCC lock harness ...
> 
> "I installed a TCC lock-up harness that keeps the TCC from locking up in
> any gear but 4th. Poof! Problem gone!  The harness installs between the
> 4-pin harness going to the tranny and the corresponding connector on the
> left side of the tranny. You can find one for about $35-40 at Summit or
> Jegs..."
> 
> Tim


So the ECM doesn't know if the TCC is actually engaged?  Makes sense...
it sure doesn't know when its stuck engaged on the THM125c....

========================================================================
D. Barry Stubbs                                    http://surf.to/z24man
(478) 745-9429                                     AOL IM: thez24man
z24man@earthlink.net          BNet Member #828     ICQ #5409648
#101STS MidGa Region SoloII   94 Q4 5spd Aqua Z26  88 2.8 5Spd White Z24
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