7747 Shift Points

[Mike Rolica]

what year was the truck?
if it is a 4l60 or 80e  it is controlled by something.  my old farts truck
(94) is not obd but it has 4l80E  and I think it is controled by a separate
pcm

> -----Original Message-----
> From:	Jeremy Gonyou [SMTP:jgonyou at hotmail.com]
> Sent:	Wednesday, September 15, 1999 2:36 PM
> To:	gmecm at efi332.eng.ohio-state.edu
> Subject:	Re: 7747 Shift Points
> 
> 
> >Hi,
> >     There are no shift points in the 747 chip unless your talking about 
> >the
> >shift light on the manual trans cals.  The only point I think you can 
> >control
> >is lockup torque convertor.  The 747 did not control the electronic
> >trans(4L60E or 4L80E) hth's
> >-Carl Summers
> 
> Ok, guess I'm confused again.
> 
> It is an electronic shift automatic.  What controls it if the ECM doesn't?
> 
> Does it have its own control module?
> 
> I swapped in a diffent prom into my friend's 305 pickup and it started 
> shifting like it was on crack!
> 
> 
> Jeremy
> 
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