no 1st and 3rd?
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no 1st and 3rd?
I was driving up a small grade dead empty and the truck went to downshift from overdrive and shifted to second. next time I stopped I noticed it started in 2nd gear. I believe my ABS light flashed on the highway during the highway speed second gear downshift. 1998 f350 automatic. plenty of fluid, doesnt smell burnt. maybe 6000 miles on the trans. 114,000 on the truck.
So as of now the truck has functional 2nd,overdrive, and reverse. gears hold strong , no slipping.
I did a search but couldnt find anything. Im a little unsure of what to search for?
any help would be appreciated.
So as of now the truck has functional 2nd,overdrive, and reverse. gears hold strong , no slipping.
I did a search but couldnt find anything. Im a little unsure of what to search for?
any help would be appreciated.
Frmr Ford Trans Engr
Joined: Aug 1999
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From: SE Florida
I can't imagine how a failed VSS could cause this.
Cargo Master
Joined: Jun 2005
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From: The Ole' North State.
You stated it was a 98, perhaps you meant 88?
Fleet Owner
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Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,725
Likes: 2,651
From: SE Florida
It needs a speed input, but no speed input or erratic speed input won't cause no first or third gears. It can make all the shifts late, but it can't prevent only two gears.
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The speedometer still works and I believe my ABS light was the only one that flashed. I will see if I can pull codes. I believe the truck has a VSS in the in the rear diff and in the transfer case? I could ohm check the sensors right? Also not that it really matters but the F350 was still a 9th gen truck in 1998.1999 was the change to the super duty platform. 1998 F250's were a tenth gen truck that looked like the f150 for one year? weird.
Cargo Master
Joined: Mar 2010
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From: Laramie, WY
The speedometer still works and I believe my ABS light was the only one that flashed. I will see if I can pull codes. I believe the truck has a VSS in the in the rear diff and in the transfer case? I could ohm check the sensors right? Also not that it really matters but the F350 was still a 9th gen truck in 1998.1999 was the change to the super duty platform. 1998 F250's were a tenth gen truck that looked like the f150 for one year? weird.
Cargo Master
Joined: Jun 2005
Posts: 3,045
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From: The Ole' North State.
The speedometer still works and I believe my ABS light was the only one that flashed. I will see if I can pull codes. I believe the truck has a VSS in the in the rear diff and in the transfer case? I could ohm check the sensors right? Also not that it really matters but the F350 was still a 9th gen truck in 1998.1999 was the change to the super duty platform. 1998 F250's were a tenth gen truck that looked like the f150 for one year? weird.
Hotshot
Joined: Jun 2015
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Thanks for the clarification. I was assuming it was might have been in a "limp-in" mode.
Hotshot
Joined: Jun 2015
Posts: 12,837
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Not a myth with Chrysler transmissions. You would only have reverse and second gear. It was enough to get you to the shop without burning up the transmission. Obviously if 2nd gear broke then you were screwed. Don't know enough about Ford transmissions to realize they did not have a similar mode.
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