The Amsoil ATF in my 1998 Dodge 1500 318 with a large ATF cooler has turned a dark cherry color.Its still tranluscent and smells ok.I did a total ATF replacement at about 40k with Amsoil ATF and at 60k did a filter and make up fluid(Amsoil).Now I'm at 94k.With the FACTORY fluid I had some torque converter lock up shutter and the AMSOIL ATF eliminated that.It still shifts and locks up good,no shudder going into lockup.Any concern with the fluid color?