This discussion of 86" auto parts boxcars stirred up another memory.
On the Los Angeles Division of the Santa Fe we served the Ford/Lincoln/Mercury assembly plant at Pico Rivera, just east of Los Angeles, and Southern Pacific served the GM plant at Van Nuys, north of the city. The auto plant business was a very high priority, as the auto manufacturers demanded "just-in-time" delivery of parts for the vehicles to be manufactured that day. That was also why the cars were designed for rapid unloading and delivery right to the appropriate assembly station. Late delivery, just once, would disrupt the assembly line for more than one day, and, if late enough, would cause the plant to shut down, taking several days to recover after re-opening. So the financial penalties to the railroad for late delivery were extremely severe. GM and Ford absorbed none of the extra cost from late deliveries.
We had a yard at Pico Rivera with round-the-clock road-switcher crews which used Alco-GE S2 and S4 switch engines to switch Ford, and also the many light industries in the area. We also had a small Car Department crew there in case we derailed a Ford Car in switching. SP had a similar operation in Van Nuys, and did some hauling from yard to yard there, using Baldwin AS6-16's, but those brutes did not switch the assembly plant. They picked up the finished vehicles in bi-level and try-level cars, as well as the empty auto parts cars, and took them to another yard for pick up. The empty auto parts cars were pretty hot on their return trip, empty, as well.
Santa Fe and SP forwarded the auto parts 2,200 miles westward, from fast connections in Chicago or St. Louis (Wabash -- by then N&W -- was one of them) on red ball freight trains. Those cars were carefully watched, all the way across our railroad, and, if the train fell behind schedule, Santa Fe went into action, pulling the auto parts out of the train and creating a Ford Special. SP did the same thing on their railroad, for GM Van Nuys. Western Pacific served a big Ford plant at Milpitas, California, near San Jose, but I'm not sure how those cars were routed to the WP.
This could happen as far back as, say, Belen, over 1,000 rail miles east of Los Angeles, or Needles, or Barstow. Ford Specials were always assigned at least 2 diesel units, taking no chance that a single unit would fail en route. The trains always had a train order allowing them to operate at passenger train speed, on curves and intervening straight track, not exceeding 70 MPH (or 79 MPH when the locomotives were geared for 90 MPH). Santa Fe had 20 F45's, 9 FP45's, and 30 SD45 and SD45-2's geared for 90 MPH, plus there was always the chance that a couple of red nosed passenger F3 or F7 units could be found at Barstow.
Ford Specials never used sidings, but the trains ahead of them sure did. The Specials were not supposed to see anything but green block signals.
So, that's the kind of handling that those 86-foot auto parts boxcars received from the railroads serving assembly plants. The business was lucrative if we delivered on time, or onerous on the few occasions that we failed.