Re: Transmission FLuid, Differential Fluid at 100k Miles
Zerex G-05 is the stuff you want, with several gallons of distilled water.
Again as to plugs and wires, I buy what Rob sells,NGK Iridium plugs and Magnecor Wires.
I offer no advice on automatic transmissions, other than, "I dont drive or like autos." Do not FLUSH it, just change fluid and filter.