$42 TH400 settings question

[blue68deville]

What do the TH400 settings do in $42? Are these hi/lo enable speeds for kickdown? What does the TPS setting do?

[mmigacz]

Somebody can confirm this, but I don't think the ECM can communicate with the TH400. There are no triggers or sensors built into the TH400.

[blue68deville]

The ECM grounds the kickdown relay to energize the solenoid in the valve body. I'm wondering if these settings are for that ground signal.

[dave w]

The ECM grounds the kickdown relay to energize the solenoid in the valve body. I'm wondering if these settings are for that ground signal.

I think you are using an older .xdf file, V4 maybe? The most current .xdf can be downloaded here: http://www.gearhead-efi.com/Fuel-Inj...Information-42 I think the parameters you have posted are not listed the same in the latest version $42 .xdf file.

The 1227747 will operate a TH400 relay with a ground signal for the "Kick Down" or "3rd gear down shift into 2nd gear".

dave w

[blue68deville]

These are what I'm using, per EagleMark's links;

$42-1227747-V4T.xdf and $42-1227747-V3T.adx are advanced files with Data Tracing for TunerPro V5 RT. For Turbo 400 trans/3 speed bin files.


If I use the V5's I get TCC lockup options only

[dave w]

These are what I'm using, per EagleMark's links;

$42-1227747-V4T.xdf and $42-1227747-V3T.adx are advanced files with Data Tracing for TunerPro V5 RT. For Turbo 400 trans/3 speed bin files.


If I use the V5's I get TCC lockup options only

Ok, the above is correct.

The answer to your question, yes the ECM sends ground to the TH400 Kick Down Relay using Pin A7 of the 1227747 ECM. I have not figured out which parameters are involved in changing the TH400 Kick Down. Maybe the shift indicator inputs / outputs?

dave w