Not sure which companies you are referring to but the ones I have mentioned use the colors you say to beware of, most companies use silver or blue paint on reman converters. I have also never seen a pump shaft break on these transmissions. I have seen incorrect installation ruin the splines and also splines wearing on the converter side after very high miles on some cars. In the 10 years I have been building I am yet to see a reman converter from the companies that I have used fail on GM fwd transmissions. Aftermarket performance converters.... That is a different story and you get what you pay for.
