- Feb 26, 2013
- Central Virginia
FWIW I changed the diff fluid on my 2016 Challenger R/T at about 10,000 miles because of a low speed growling that sounded like tires rubbing when I made a hard turn at low speeds. It had Mopar syn fluid from the factory but I replaced with Syn Valvoline 75W-90 and a bottle of Lubegard additive. No noise now and the fluid that came out (factory fill) looked good w/o any glittery stuff or discoloration.