2006 TBSS 4l80 Swap

[Brad Brand]

Can someone help me with this? I did the wiring swap and I'm trying to run it off the 4l65 tune. Tried a 4l80 tune and would not work. It cranks and is stuck in 2 or 3 gear and does not change? If someone could fix or help me with this tune that would be great. I did a swap on a 07 1500 truck wring change and loaded a 4l80 tune worked great but no go on this one. I've been working on it a week PLEASE Help!!!

Thanks
Brad Brand

[joecar]

Did you invert the 2-3 shift signal...?

[Brad Brand]

Did you invert the 2-3 shift signal...?

How do I do this? I moved the brown and white wires on the conn. Were is the shift signal? Thanks

Brad

[joecar]

Ok, you moved the TCC On/Off signal wire to the TCC PWM pin.

You also have to invert the 2-3 shift signal using a relay...

i.e. the relay inverts the on/off sense of the 2-3 shift signal

relay is connected as follows:
- the relay control coil is connected between 12V and the 2-3 shift solenoid signal from the PCM,
- the NC (off) relay contact goes to GND,
- the NO (on) relay contact goes to 12V,
- the swinging contact goes to the 2-3 shift solenoid signal in the trans,

i.e. so when the PCM has the signal off (12V) the relay turns it on (GND), and vice-versa.

See here:
4L80E-Reference-Material <-- post #12
4l80e-4th-gear-and-tcc-problem

[Brad Brand]

Where are the wires at that I need to hook to a relay?

[joecar]

Where are the wires at that I need to hook to a relay?

Between the PCM connector and the transmission connector (i.e. on the outside of the transmission).