Hey y'all, I've seen a few topics that address this in different ways but none with the same basic symptoms as mine...all shifts nice and firm, but absolutely no lockup.

This is a used 4l60e with it's TC out of a mid 90's K1500 pickup. I just installed it as-is into my 95 K1500 Sub. All I did was replace front pump seal, change filter & fluid, & wash it off. Shifts great, but no lockup whatsoever.

I checked all the electrical connections & read alot...so it looks like I need to plug up the scanner & make sure the PCM is sending a lockup command?

And if it is, I need to replace the TCC Solenoid, right? Sounds easy enough...someone tell me if I'm wrong here... Please and thank you