The ONLY additive I would ever put into an automatic is called Lube-Gard. All transmissions which cross my bench leave the shop with Lube-Gard red in it. I would service this trans first and add a bottle of Lube-Gard in the RED bottle. Stay away from all those other additives especially Lucas products. That gooey Lucas junk is a PIA for a transmission builder to get out of a trans during overhaul. And with your transmission??? Your transmission is a complicated one to build, with an ungodly amount of parts in it. I have the pleasure of building 3 or 4 of these every month. I cant stand that Lucas stuff mostly because it messes up my vats. Try the service with the Lube Gard in it and see if that doesnt straighten out your 1-2 issue. Let us know what happens.
transman