» » »

Ford Q&A

Ask Your Question

1990 Ford F-350 Question: ford f350 transmission shifts up and down

 

Question

matthewreissner, 7.3L V8 Diesel, Lincolnton, NC, March 11, 2011, 04:00
 Rookie

hello i have a f350 and when im just cruising throught own at like second gear the transmission will shift up then back down and keep doing it till the trucks shift to drive what could be causeing that

1 Answer
Flag This
  • Answer #1

    DaveJHM March 11, 2011, 05:29
    Profile_thumbnail
     Master

    You likely have an E4OD automatic transmission. (there was a C6 available, but it's a 3 speed only with no overdrive).

    I suspect you have an issue with your FIPL sensor (Fuel Injector Pump Lever). This sensor is a potentiometer, much like a throttle position sensor, that influences transmission shift points on the Diesel powered vehicle. It can be adjusted, and probably needs to be.

    You need to find someone with experience on these older Diesel trucks. There was a limited time frame when FIPL sensors were in play, and many new techs don't know what they are.

    Reply
    Flag This