1999 F350 PSD Tranny or Torque Converter issue?
I have a 1999 F350 service truck. Its a dually 4wd crew cab 8 ft bed. I was driving it today and when I got to 45 mph it shifted into top gear and there was a lot vibrations and jerky. Truck was real rough until I slowed down to a stop light and when I sped up it did it again in the top gear only. It doesn't matter the rpm its real rough. Engine seems fine its just the trans or the torque converter I think is acting up. Wondering what you guys think?
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