Transmission problem
1999 Chrysler Grand Voyager 6 cyl Two Wheel Drive Automatic 164123 miles
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speedo does not reg speed intill doing 50/55 mph, speedo jumps 0 to 150 and rev limitor cuts in and out when speedo come back to 0. Do you know this fault and if so whats the cure, and trip computer does not read prop,

possible speed sensor
I would replace both input and output sensorsa