Ford Super Duty (1999-2016) :: Grinds And Chunks When Pushing From 4th Into 5th Gear
Oct 4, 2015
I've got a 2000 F-250 SuperDuty with the 5.4L V8, and a standard transmission and about 140k miles - just bought the truck several months ago. Trying to figure out what's wrong with either the transmission or the clutch. Here's the symptoms, any feedback is welcome:
1. If I shift too quickly into 5th from 4th, say 'pushing' from 4th to 5th directly, it grinds and chunks in every time.
2. If I shift slowly, 1-2-3, 4th into neutral, neutral and push right to line up with 5th, then into 5th, slight pause on each move, then it usually shifts into 5th silently and no problems ...but sometimes will grind just a tad.
3. If I shift from 4th into Neutral, leave it in neutral and let the clutch out then step on the clutch all the way and wait before shifting into 5th ...even if I wait several seconds (say 'close to 10 seconds'), it will grind every time ...a good grind that bugs me to do. I'm careful to avoid this.
4. Usually, if it grinds into 5th, I can shift down to 4th, let the clutch out and drive a short way and try again ...and it'll grind again. Best way to avoid grinding into 5th is to drive normally, and use the 1-2-3 'slight pause' method of shifting into 5th. This is what I do all the time, trying to make the tranny last as long as possible.
It's like the 5th gear synchro isn't working well, or perhaps the clutch is not fully disengaging? What's wrong? I wonder if the truck (haven't looked it up yet) has a hydraulic clutch and maybe the clutch is not fully disengaging ...pumping the clutch pedal sometimes seems to work, but most often doesn't. Sometimes, I have difficulty shifting back down into lower gears as well ... no grinding, but you have to double clutch just right to get it to go into gear (3rd, or 2nd).
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