Ok guys. I'll make this story short. I have a 4l60e behind an ls1 with stock wiring harness and computer. It has all been swapped Into my 98 v6 camaro. The Trans is a built Trans that I know worked in the car it came out of. Anyways I've had issues off and on lately: sometimes It's fine. Other times it will shift from first straight to third, and if I pull down to second it will attempt to pull, but eventually kick out and just free rev. We'll my car was messed up for a week, then this last week it was perfect. It was dynod yesterday but the tuner was controlling the shifts via hp tuners, so we know the Trans isn't hurt. Last night it acted up some more and after driving a few times and hitting bumps it worked flawlessly, then back messed up. We have narrowed it down to a possible wire that has been pinched chaffed or even a pin In the connector. I need to do some testing. And I know there are 14 wires on the connector. So which one should I be looking for the shift into second gear. I have a wiring diagram of all the colors, but no clue which wire or wires are actually the one in control of the shift into second gear. Also if anyone knows which pin it is in connector or computer connector that would be awesome. Thanks for any help.

 

You should look at the wiring for Solenoid A. Here are the pinouts and diagrams:

See my post #4 in this thread:
https://ls1tech.com/forums/automatic...lems-help.html

And a full diagram:
http://www.msgpio.com/manuals/mshift/wiring.html