2006 4x4 F-350 V-10 automatic, speedometer problems
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New User
Joined: Dec 2008
Posts: 11
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From: southeast Georgia
2006 Lariat V-10 automatic 4x4, speedometer not working correctly
I am trying to locate the source of my speedometer problem. I have a 2006 Lariat V-10 4x4 F-350 with automatic transmission with all options including on-board computer for estimating gas mileage, etc.. My speedometer is intermittent. Im trying to locate the VSS (in one or more locations) and was told the speed sensor (VSS) was located on the center of the rear drive axle. I unplugged the 2 wire harness located there, and the speedometer kept working (intermittently) as before, except the ABS Light came on (on the instrument panel) and stayed on all the time, when I test drove the vehicle and when I was sitting still. Keep in mind the 2-wire harness was unplugged from the rear drive axle this entire time.It seems every mechanic Ive talked to gives a different location for the VSS on my truck. One even told me that there were three VSS on my truck because it is a 4x4. Im trying to narrow this down. Need Help. Thanks
Thread Starter
|
New User
Joined: Dec 2008
Posts: 11
Likes: 0
From: southeast Georgia
2006 4x4 F-350 V-10 automatic, speedometer problems
I am trying to locate the source of my speedometer problem. I have a 2006 Lariat V-10 4x4 F-350 with automatic transmission with all options including on-board computer for estimating gas mileage, etc.. My speedometer is intermittent. Im trying to locate the VSS (in one or more locations) and was told the speed sensor (VSS) was located on the center of the rear drive axle. I unplugged the 2 wire harness located there, and the speedometer kept working (intermittently) as before, except the ABS Light came on (on the instrument panel) and stayed on all the time, when I test drove the vehicle and when I was sitting still. Keep in mind the 2-wire harness was unplugged from the rear drive axle this entire time.It seems every mechanic Ive talked to gives a different location for the VSS on my truck. One even told me that there were three VSS on my truck because it is a 4x4. Im trying to narrow this down. Need Help. Thanks
Mountain Pass
Joined: Feb 2005
Posts: 162
Likes: 1
From: Hudson, NH
I ran into similar problems earlier last year and did some research. It did end up being a bad VSS in my case which is located on the top of the rear differential.
There are also a couple of sensors in the automatic transmission. One is called the OSS and the other the TSS. I am not a gearbox expert and could not being to tell you their exact function but my earlier research did tell me that the PCM validates the VSS sensor data with the TSS/OSS sensors. This is the way the truck can tell if a wheel in the rear is slipping and needs to actuate ABS from what I understand.
It could be that the TSS or OSS in the gearbox is bad. They are at the top of the gearbox from what I remember. If you do a search on this forum for TSS and OSS I am sure you will find some info. Best of luck and let us know what you find out.
---Aaron
There are also a couple of sensors in the automatic transmission. One is called the OSS and the other the TSS. I am not a gearbox expert and could not being to tell you their exact function but my earlier research did tell me that the PCM validates the VSS sensor data with the TSS/OSS sensors. This is the way the truck can tell if a wheel in the rear is slipping and needs to actuate ABS from what I understand.
It could be that the TSS or OSS in the gearbox is bad. They are at the top of the gearbox from what I remember. If you do a search on this forum for TSS and OSS I am sure you will find some info. Best of luck and let us know what you find out.
---Aaron
