1. Please put your year and model in your signature. We can't help you until you do.
2. Try to express yourself a little more clearly. Using slang and abbreviations when describing technical detail doesn't work very well.
3. By 'traction is on' I assume you mean the LIGHT? That means traction is OFF. Check the wiring to the backs of the hubs for the wheel speed sensors. He probably broke or disconnected one.
In the long run, I'm beginning to gather that you got what you paid for. It sounds like a used trans that wasn't serviced, and it was installed by a sub-par mechanic at best.
Until you pull codes there isn't alot we can do for now.