overdrive issues
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New User
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overdrive issues
i have a 2000 f-150 and recently was driving it on the interstate at about 75 mph for a long period of time. the overdrive light on the shift column begin to flash on and off. what is the cause of this and how can it be fixed. i have around 107,000 miles on the truck and it is 4x4.
thanks for the help in advance.
thanks for the help in advance.
Lead Driver
Joined: Jul 2004
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From: in the woods of MA
Yes, as Ultramagdan said..
When the OD light flashes that indicates the computer is logging errors. Could be any of a whole bunch of different things, so you need to get it scanned to get the exact error code(s)...
When the OD light flashes that indicates the computer is logging errors. Could be any of a whole bunch of different things, so you need to get it scanned to get the exact error code(s)...
Senior User
Joined: Dec 2006
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From: New Mexico
It is probably your speed sensor in the transfer case.
If it blinks after changing that, it is very likely the $10 plastic gear for the speed sensor inside your tailshaft housing that needs replaced.
If it blinks after changing that, it is very likely the $10 plastic gear for the speed sensor inside your tailshaft housing that needs replaced.
Lead Driver
Joined: Jul 2004
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From: in the woods of MA
Originally Posted by StephenH
It is probably your speed sensor in the transfer case.
If it blinks after changing that, it is very likely the $10 plastic gear for the speed sensor inside your tailshaft housing that needs replaced.
If it blinks after changing that, it is very likely the $10 plastic gear for the speed sensor inside your tailshaft housing that needs replaced.
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From: New Mexico
Originally Posted by NewEnglandHerdsman
Do those parts "soft fail"? A complete failure of the speed sensor would be obvious as the speedometer would not be working, right?
I replaced the VSS twice and was at a loss. The tranny shop wanted to tear down my tranny. Then I found that gear...
Ford made an updated tighter one you can get at the dealer for around $10-$20.
Lead Driver
Joined: Jul 2004
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From: in the woods of MA
Originally Posted by StephenH
Yes. My speedo worked fine, but the plastic gear caused my o/d light to flash (setting a VSS sensor code) because the factory gear is loose and jumps teeth.
I replaced the VSS twice and was at a loss. The tranny shop wanted to tear down my tranny. Then I found that gear...
Ford made an updated tighter one you can get at the dealer for around $10-$20.
I replaced the VSS twice and was at a loss. The tranny shop wanted to tear down my tranny. Then I found that gear...
Ford made an updated tighter one you can get at the dealer for around $10-$20.
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Senior User
Joined: Dec 2006
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From: New Mexico
That is your problem. Take about 30 min to drop the driveshaft and pull the tail housing /replace.
There is actually a TSB somewhere that describes this very issue.
There is actually a TSB somewhere that describes this very issue.
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Lead Driver
Joined: Jul 2004
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From: in the woods of MA
I found a TSB for the '97 which mentions that (TSB 98-5-8), but it only lists the 97 F250 light duty, not the heavy duty that I have. But I think I'll swing by the dealer and ask a couple of questions - sounds like too good match to ignore...
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thanks for all the input. I will try locating the speed sensor and gear and try changing them. hopefully this will fix my problems. to read the code will a hand held obd tester read this code or will it have to be taken to the garage?
Senior User
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From: New Mexico
Originally Posted by stickboy42461
thanks for all the input. I will try locating the speed sensor and gear and try changing them. hopefully this will fix my problems. to read the code will a hand held obd tester read this code or will it have to be taken to the garage?
The VSS is located on the tailshaft housing of your transfer case. It is pretty easy to find. THe plastic gear is inside. You can stick your finger in the VSS hole and feel it.
Hotshot
Joined: Jan 2004
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From: St Louis
Any scan tool that supports "enhanced" or "manufacturer's" codes will read the tranny fault codes. The el-cheapos won't. Consult the owner's manual for the scanner to see what it's capable of.
Steve
Steve
