FoMoCo just like all the other manufacturers have tended to go towards JIT assembly lines. JIT == Just In Time, where the inventory needed for current production, a short period of time, is next to the line. Other parts are either in a staging area, quickly accessible to keep the line in productive mode(moving), or arriving at the loading dock. They likely do not keep 500 7-pin hitches next to the line, or maybe even in-house, but that's just one item.It's the other way around. The more parts they have, the more parts they want to use early so they don't have to pay to store the extra parts while they build simpler units.
So say they order 500 7-pin hitches. Then they'll want to use up those first rather than have them sit and wait for base XLs to finish. This is why the most complicated units are built first--cheaper and more efficient logistics.
Kanban or JIT requires the sub-assemblies to be readily available from suppliers. A seat manufacturer(forget the name) would actually co-ordinate with the plant to load the seats onto their truck in reverse order of the builds scheduled for that day. FILO, so the first out of the truck were the first needed when the line started moving. All other seats dribbled out of the trailer onto the conveyor/loader in the order needed to match the color of the vehicles in production. Engine/transmission assemblies are shipped in packaging, I've seen 12-packs, and so on, that fit onto a pallet/base that can be set and loaded directly. Do not know if they are 'synched' or one is just picked from the packing and placed onto the cradle.
Anyway, my take is there are problems in CVTe-2.5 land, something does not assemble well, or doesn't fit. I have not read of any problems in the transmission assembly plant, but figure the Hermosillo plant is not quite doing as well. Could be a training issue and they are doing the aseemble-grade-take-apart-repeat until they get it right the first time.
tom
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