The AM Pacifics weren't meant to go that fast anyway, but the Budd cars draw a LOT of current with the light bulbs in them. My set with six cars drew more than a small transformer could put out. So I simply disconnected the wires on the trucks leading to the inside circuit. Runs great, but no lights. If I had the time, I'd convert the bulbs to LEDs. Way too many projects now, including getting my PE to smoke again. That one may be a lost cause, though.
By the way, Ron at American Models uses white lithium for axle lubrication. on these cars. Just a LITTLE dab will do ya...