Electrical problem affects tran (safety mode)

I've struggled with electrical problems due to corrosion for the last 2 years. Always the same sysmptom, after about 15 imnutes of running the transmision will go into safety mode (2nd gear only). I have always fixed it by cleaning or replacing the battery terminals.

The problem appeared again 3 weeks ago and the usual didn't do it. So I replaced both the negative and positive battery cables. I tracked down and cleaned several ground connections. I also cleaned all the conenctions to the drivetrain control module. But the problem persits.

Any suggestions what to check next?

First of all, most all information on your vehicle.

94 S10 V6(4.8L) auto
runs great other than the tranny going inot safety mode after about 10 minutes of running

4.3?

What about the connections on the tranny?