What would make my 2003 navigator transmission stop working completely while driving down the road with no warning?

Asked by Oct 10, 2016 at 09:53 PM about the 2003 Lincoln Navigator

Question type: Maintenance & Repair

I was driving down the road when the RPM's went real high and the
transmission just stopped working completely. I pulled over and it won't do
anything in drive or reverse. It gave no warning of any problems other than
bucking randomly every now and then. Please help

5 Answers


It sounds like your transmission is burned out. You could do a complete change (no flush) and filter as a last resort, it may come back to life. Some Lincolns also have a torque converter drain, which will enable a more complete job. If that doesn't work some additives may help.


It is possible that the TCM just went open circuit, if that happened then there is nothing to tell the tranny what to do as everything is electronic on this rig. A good tranny shop will be able to plug in to the harness and actually see if the module or the trany has went bad.

1 out of 1 people think this is helpful.

Would that make the transfer case also not kick in?


Yep the tranny drives the transfer case.

1 out of 1 people think this is helpful.

That is correct, the tranny must work for the transfer case to function.

1 out of 1 people think this is helpful.

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