Ford's Lincoln luxury brand sales slipped 7.2 percent, with all nameplates posting declines except the Navigator, which was up 77 percent.
Through the first nine months of the year, Ford Motor's sales are down 2.4 percent from 2017.
Brands: Ford down 12%, Lincoln down 7.2%.
2018 U.S. market share: 14.5% through Sept. vs. 14.9% through Sept. 2017.
Notable nameplates: F series down 8.8% to 75,092, Mustang down 1.3%, Fusion down 25%, Explorer up 0.7%, Escape down 20%, Expedition up 27%, Lincoln Continental down 23%, Lincoln MKC down 8.1%, Lincoln Navigator up 77%.
Incentives: $4,784 per vehicle, up 7% from a year earlier, according to ALG.
Average transaction price: $37,499, up 5.4% from September 2017, according to ALG.
Fleet mix: 24.9%, up 1.2 percentage points from September 2017.
Inventory: 604,157, a 77-day supply. That compares with 605,851, a 75-day supply, at the end of August.
Quote: "We don't worry about being in a contest with them," LaNeve said about FCA US eclipsing Ford in monthly sales in September.
Did you know? F-series pickup sales topped 70,000 for the seventh consecutive month. And three times so far this year, F-series sales have actually surpassed 80,000 in a month.