RE: Mandatory TC Lockup

["TRAX" <trax@frederickmd.com>]

Bruce (and others),

I am tuning a 1991 Z-28 (original 305, now with 350).  I used the stock
AUJP1350 (16151350) GM MemCal as the base image.  This car has a 2400 stall
converter on a fairly freshly rebuilt 700R4.  There is an external tranny
cooler mounted and used in conjunction with the stock cooler.

I've made several changes to the stock bin but the only change regarding the
tranny was the TC lockup at lower speeds.  I raised the GM setting from 38
to 40 and the unlock from 36 to 38.  ALL of the TC tables are stock.

Bruce - do you think you might be able to bench test this image regarding
the upper 'mandatory' TC lockup if I get the bin file to you??  It would be
very cool if we could add this parameter to the 730 ecu file so that we
could modify it.

Tim

>-----Original Message-----
>From: owner-gmecm@diy-efi.org [mailto:owner-gmecm@diy-efi.org]On Behalf
>Of Bruce Plecan
>Sent: Thursday, July 06, 2000 9:21 AM
>To: gmecm@diy-efi.org
>Subject: Re: Mandatory TC Lockup
>
>
>
>
>> Mine is 89 TPI code (vette, I think) I use in my 87 IROC w/ 700R4 that I
>> got from Terry K.
>> IIRC, Tim has a 90 IROC with 700R4
>> >There are tranny configures that might also explain it.
>> >ie overheat switch, as I recall forces a TCC lock up in some stuff.
>> I doubt thats the problem...
>
>ESQQQs me, but I've seen similiar things happen, so I don't rule out
>anything til, I know for sure.
>
>> >What may seem MPH related can be a temperature deal.  (ecm
>bench is handy
>> >for that stuff)
>
>Depending on what the application did in fact turn out to be, I
>was going to
>offer burning a eprom and running it in my test ecm, and do a rewire to see
>if it was ecm related, or if it was mechanical.
>Grumpy
>
>
>
>
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