[Diy_efi] TCC control

[Bruce]

There is no way I know of to convert a 700R4 to ECM (actually it would be
PCM) control.  The best thing to do with an early 700R4 is set it to the
side, and get a later one with the remote secondary valve body.   The only
ecm, tranny relationship is that of the TCC control (that I've seen).   The
4L6E is a whole new kettle of fish.   For the unltimate in tranny control
youo'd want a 4L6E or 4L8E, and then use someting like a 8051 PCM to control
it.
   While some have had good fortune with a L-U TCC, and a 700R4, my best
experience has been going non L-U.
Bruce


----- Original Message -----
From: Ne14RoxCJ at aol.com
To: diy_efi at diy-efi.org
Sent: Thursday, July 04, 2002 5:52 PM
Subject: Re: [Diy_efi] TCC control


what kind of mods have to be done in the '85 valve body to control it with
the ECM? I know the 4-3 downshift switch must be removed because that is a
function of the ECM (through delta TPS% ?). What about the plugs they (GM)
installed in place of the TV sleve and the TCC shift valve. Will I need to
install the aluminium plugs? These mods are why I decided on the old style
control. But, you seem to have some experience with both. I'm split between
the simplicity of the old style and the adjustability of the ECM control.
I'm running a Comp 4X4 Xtreme cam (218int/226ex w/111 lobe sep.) Will that
cam cause the vac. switch to search, like you described? I'm a few days from
starting the truck and in the middle of the EFI wiring. I'm on a time limit,
but I want to do it right the first time. So any experience shared would be
greatly appreciated. Thanks again.

Beau

P.S.  any ideas on what EPROM mods to start out with would be a real help.
Considering the above cam, Pro-jection TB w/85 PPH injectors, pre-'95 heads
(68cc) with pocket porting, Edelbrock Performer intake. I have a few stock
.bin's already burned in hopes that one will at least get me started. I also
have a scan tool and an EPROM burner to help with the task. But,
professional advise is always welcomed.


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