[Gmecm] Geting rid of electronic transmission.

[Jason M.]

www.700r4.com is a pretty decent source of information, they also have the 
parts.

When I converted my 82 caprice to a 700r4 I used a brake switch and a manual 
switch on the dash for lock up.  Works really nice.  This car originally was 
a diesel with a 2004r, and still has a switch on the throttle pedal for the 
TCC.  Still haven't hooked it up to see if it works, or how it works.

Usually I'll let the car warm up to temperature before activating the TCC. 
Due to valving the TCC cannot lock in 1st, and seems to be over 20 in 2nd 
the TCC locks, then anytime in 3rd or 4th.  I sort of like it for driving 
around in town, can be driving 25mph in 3rd with the tcc locked turning 800 
rpm, or 35mph in 4th turning 900 rpm.

My set up doesn't use a relay, although most schematics/kits use one.  No 
problems in over a year.

This summer I'll be swapping to a 305 chevy and another 700r4, will probably 
redo the TCC control to be a little more automatic.  Would at least want a 
throttle switch of some kind.  The current engine is an Olds 350 that really 
likes being "lugged down"  The 305 as planned, doubt it.

Jason.


----- Original Message ----- 
From: <davesnothereman at netscape.net>
> For tcc control without an ECM you need to obtain a 4th gear switch if 
> your trans doesn't have one.  It's originally used to tell the ecm that 
> the trans is in 4th by making a connection to ground.  This switch should 
> be connected to the control side of a relay, which in turn connects either 
> power or ground to the TCC.  For additional convenience a factory brake 
> switch can be connected in series in the relay control circuit to unlock 
> tcc when the brake is depressed.  And to make TCC operation smoother and 
> less intrusive there are vacuum switches and various other switches which 
> can be used as well.  I believe some google searches will come up with 
> nice diagrams and pictures of different ways to do this.  The 700R4 
> retrofit is fairly popular, and most of 'em end up going with TCC lockup, 
> either because they heed warnings, or because they learn by experience.
>
> Good luck.
> Zaphod
>