Any problem using plain old 90W GL4 with the traction loc additive for break in?

All new parts except for the case. New gears, rebuild kit with bearings, shims etc. New Traction Loc. Professonally set up. As stated if the bearings don't fix it I pull the center section and take it back to the guy who built it to figure it out. Thats what he has already told me to do. Just trying to confirm that the GL4 should have not caused the problem. I had discussed the GL 4 here recently and never had any negative feed back on it.