4L60E Trans only shifts 2 and 3

[ls1nova71]

Thats an awful lot of codes for something like one sensor to have gone bad all of a sudden. Being this is a swap, I am still leaning toward a wiring issue. Did you check for power at the big round plug on the transmission?

[ewoody625]

Originally Posted by ls1nova71

Thats an awful lot of codes for something like one sensor to have gone bad all of a sudden. Being this is a swap, I am still leaning toward a wiring issue. Did you check for power at the big round plug on the transmission?

I have 10.6v at the pink wire on the big round trans plug. That is what I am currently tracing back to see where my voltage drop is coming from. I do not have the tcc wire hooked up, I was told that is optional. To clarify, the tcc gets power from the brake switch? Or it goes to the brake switch and to a power source? I'm at the end of my rope on this. Ready to pull it all out and put my 350 back in. I appreciate the information.

[dayj1]

Originally Posted by ewoody625

I have 10.6v at the pink wire on the big round trans plug. That is what I am currently tracing back to see where my voltage drop is coming from. I do not have the tcc wire hooked up, I was told that is optional. To clarify, the tcc gets power from the brake switch? Or it goes to the brake switch and to a power source? I'm at the end of my rope on this. Ready to pull it all out and put my 350 back in. I appreciate the information.

Just in case you weren't aware, there are 2 pink wires in the trans connector, pins "E" and "N". "E" is the 12v ignition power and "N" if from the transmission fluid pressure switch and runs back to one of the PCM connectors. Be sure you're checking pin "E".

[ewoody625]

Originally Posted by dayj1

Just in case you weren't aware, there are 2 pink wires in the trans connector, pins "E" and "N". "E" is the 12v ignition power and "N" if from the transmission fluid pressure switch and runs back to one of the PCM connectors. Be sure you're checking pin "E".

I believe I have the right pin. I checked both. One was showing less than 1 volt the other I had 10.6. I assumed the one with the higher voltage was the correct wire. I'll have to double check I'm following the pin E wire. Thanks

[Duck1]

Originally Posted by ewoody625

I have 10.6v at the pink wire on the big round trans plug. That is what I am currently tracing back to see where my voltage drop is coming from. I do not have the tcc wire hooked up, I was told that is optional. To clarify, the tcc gets power from the brake switch? Or it goes to the brake switch and to a power source? I'm at the end of my rope on this. Ready to pull it all out and put my 350 back in. I appreciate the information.

And spend money on a drive shaft. Worst gas mileage. Instead of fixing the problems

[ls1nova71]

Originally Posted by Duck1

And spend money on a drive shaft. Worst gas mileage. Instead of fixing the problems

????