Overdrive Issue?
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Overdrive Issue?
Hi everyone - I'm new to the forum. I did some searching but I wasn't finding an issue quite like this (or at least not that I could tell was quite like this). I have a 1993 F-350 XLT, Crew Cab, Long Box, 7.5L gasser. It's a recent purchase with about 85k original miles. The truck seems to run pretty good with few noticeable defects. One issue I've noticed so far is that the truck won't go more than about 2 mph if the Overdrive is engaged. The truck starts with OD engaged, so I just have to remember to turn it off right away which is no big deal. However, I will be doing a significant amount of distance driving on this truck, so I want to make sure I'm setting myself up for success and nipping any gas mileage issues in the bud before they start to damage my wallet. Any one have any great ideas? I'm hoping to start with the easiest/least expensive and work my way up.
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
I'm not sure I undersand. Are you saying that if overdrive is on the truck will move, but won't go faster than 2 MPH?
What happens if you put the shifter in 1 or 2? Will it accelerate normally then?
What happens if you put the shifter in 1 or 2? Will it accelerate normally then?
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Well, "tomorrow" was ambitious. This isn't my daily driver. I tested this out this morning. It accelerated normally in 2 with overdrive on.
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Canceled OD in D position works normally. As I discovered this morning, in 2 it works either way. I've been a bit too paranoid to try to engage the OD at higher speeds given its behavior from standing still.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,732
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From: SE Florida
I believe that your overdrive one way clutch has failed. That will take a rebuild to fix.
Once you are going above 40 MPH o so you can turn OD back on and it will go into overdrive. The problem that you may see is that the one way clutch can start to disintegrate and that will send metal particles all over the transmission, which can cause any sort of failure.
Once you are going above 40 MPH o so you can turn OD back on and it will go into overdrive. The problem that you may see is that the one way clutch can start to disintegrate and that will send metal particles all over the transmission, which can cause any sort of failure.
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I believe that your overdrive one way clutch has failed. That will take a rebuild to fix.
Once you are going above 40 MPH o so you can turn OD back on and it will go into overdrive. The problem that you may see is that the one way clutch can start to disintegrate and that will send metal particles all over the transmission, which can cause any sort of failure.
Once you are going above 40 MPH o so you can turn OD back on and it will go into overdrive. The problem that you may see is that the one way clutch can start to disintegrate and that will send metal particles all over the transmission, which can cause any sort of failure.
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