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Message: [QUOTE="truckpullin_75, post: 1145433, member: 1029"] Have a customer with a 2012 F550 4x4 with the 6.7 that is stuck at the Ford dealer. Truck is bone stock, with the exception of a PTO, and has less than 50k on the clock. This is all second hand from the driver and the tech at the dealer, but waht I've been told is that the TCM is failing to communicate with the ECM. When it fails, the truck goes into what sounds like limp mode only allowing it to run 50 mph or so, the gear indicator goes blank, and then after it is turned off it will not restart. It has been "fixed" (new TCM) at least three times now, only for him to get about 60 miles down the road and do it again. I just found out this morning that the shifter doesn't feel right when it happens but I don't see that changing by anything electronic, that part may be in the driver's imagination. Anybody have any ideas or ran into this before? Part of the problem is the truck is leased and the leasing company won't let anybody other than Ford work on it, even for an oil change. [/QUOTE]

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