Why is there a yellow sticker on my gearbox? (Extreme Detailing)

The yellow sticker - after an extreme detailing rebuild

Between 1968 and 1972, Saginaw gearboxes left the factory with a yellow sticker. We reproduce this original factory condition when we perform extreme detailing on a gearbox for vehicles in that range of years.

How the yellow sticker might appear - prior to rebuilding

 

Marty Preuss