Search:

The resistor is placed between the previously unconnected relay terminal and +12v so that when the TCC enable is off, the TCM will still detect what it thinks is a solenoid. By my calculations, a 2...

This TCC relay scheme works great by the way. I have now tested it. The only thing I had to do was add a 100ohm 10W resistor so that when the TCC is disabled, the TCM will still detect a solenoid...

That looks to be it! Strange how the service manual I D/L'd doesn't have this. Thank you doubledip!

I was wrong about the Silverado. I bought and downloaded a digital copy of the entire 2007-2009 Silverado (2500/3500 HD included) service manual and it only has transmission sections for...

Thanks doupledip! Is there another one of these for the 4L80e? I see this show a 3-2 solenoid and a TCC solenoid (non-pwm) which the 4L80e does not have. But this does show the ISS which I...

Here's the T42 to 4L65e connector pinout.

12074

Anything with a 4L80e controlled by a T42. It looks like 2007 Yukon, 2008 Silverado, 2008 Express Van. (These are what I've found tunes for)

I have the service manual for my '06 GTO, so I can...

I've been scouring the 'net looking for the T42 connector pinout as connected to a 4L80e. Have not found one.

Does anyone have one they can post, or, can anyone conform or deny that the signal...

Thanks Taz. That did occur to me, which is why I would run the PWM through the relay, meaning, the PWM is not activating the relay, the relay is simply conducting the PWM signal between the...

I should follow this up.

I completed the conversion to the automatic in the GTO a couple years ago. I broke the T56, so I was motivated. :)

Along with the obvious changes such as replacing...

Resurrecting this old thread.

JoeCar, I have an idea for controlling the 4L80e TCC using BOTH TCC signals from the 4L60e controller.

Why not connect the TCC PWM signal line to the 4L80e via an...

I bought another E40 off eBay. Hopefully I'll be able to flash it with the A4 GTO OS. (Its out of a Malibu, but has the correct part# 12596679)

I read the GTO T42 I have as well. Then loaded...

Maybe something *is* commanding reduced torque? You have the A4, so it could be the TCM. Perhaps traction control as you mentioned. Forgive me if this has been covered, but have you tried...

Thanks for the input. I do tend to overcomplicate things sometimes. :confused:

I actually have in my posession a T42 and engine harness from a donor '06 GTO. My thought was that I could swap...

Yes, a very large effort as far as time consumed. Getting the bin won't be so bad, it the reverse engineering effort that follows that's going to take weeks or even months.

I want to patch the...

Thanks for the Reply Al !

Looks like I'm going to have to write something the read these on my own then.

-Mike

Does anyone know what it is? I've found info on various ECMs, but none for the TCM.

If I read a TCM with EFILive and save to a file, is that file in raw format or is it encrypted? I'm looking...