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F250 Experts Need help
![]() | Iowafun
Join Date: Jul 2004 Posts: 955 Central Iowa ![]() ![]() |
2006-08-10 133162
Alright, 2000 F250 SD w/diesel 4x4, etc...
Truck has rear ABS only. The ABS light kicked on this morning so I have no rear ABS. Also, the speedo no longer functions below 35 mph. Speedo kicks in when I get to and above 35 mph and drops to 0 when I slow down below 35 mph. Also, the overdrive light on the auto tranny lever flashes a long sequence of flashes.
Any idea of the possible causes? Dealership with the computer to read the problem can't get me in until Monday.
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F250 Experts Need help
![]() | kwschumm
Join Date: Feb 2003 Posts: 5764 NW Oregon ![]() ![]() |
2006-08-10 133164
I think most auto parts stores these days loan out or rent code scanners. ....
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F250 Experts Need help
![]() | yooperpete
Join Date: Jan 2004 Posts: 1413 Northern Michigan ![]() ![]() |
2006-08-10 133165
Have you driven in a bunch of rain lately such that the module got wet? Another chance is to disconnect the battery at the terminals for over 1/2 hour. I've been told that the computer then resets itself. ....
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F250 Experts Need help
![]() | Iowafun
Join Date: Jul 2004 Posts: 955 Central Iowa ![]() ![]() |
2006-08-10 133173
We've had rain off an on. But no rain last night and it worked fine. Then this morning, it didn't work while parked in the garage.
I'll check with the local auto parts guys and see if they have a scanner. ....
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F250 Experts Need help
![]() | AnnBrush
Join Date: Mar 2004 Posts: 463 Troy OH ![]() ![]() |
2006-08-10 133174
Autozone carries free scanning as part of their efforts to sell parts ....
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F250 Experts Need help
![]() | Murf
Join Date: Dec 1999 Posts: 7249 Toronto Area, Ontario, Canada ![]() ![]() |
2006-08-10 133176
Right up to the tranny sending you sephamore signals I was thinking it was a bad wheel sensor. They will do exactly what you described.
When I got to the flashing light part, not so good.
From what I know of the auto's (we got rid of all of ours) anytime the shifter light flashes means the problem involves the tranny. To what extent it is involved Iwouldn't even care to guess.
Best of luck. ....
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F250 Experts Need help
![]() | ksmmoto
Join Date: Jan 2004 Posts: 41 Central Lower Michigan ![]() ![]() |
2006-08-10 133190
My 2002 F-150 had the tranny light flashing and also shifted very hard at eleven months and 11,000 miles. Turned out a part went bad, was a rare problem and I had to wait two weeks for parts. They also replaced the main computer as they thought it went out also.
All was covered under warranty and now I have 44,000 miles with no problems at all.
ksmmoto ....
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F250 Experts Need help
![]() | Chief
Join Date: Jul 2003 Posts: 4297 Southwest MiddleTennessee ![]() ![]() |
2006-08-11 133202
I am not up on the F250's but it sure does sound like a speed sensor either on the transmission or at the wheels. In many applications called the VSSB or vehicle speed sensor buffer which is typically mounted on the transmission. The VSSB typically is configured to send a gathered and conbined speed data signal to the speedometer. Might be worth taking a look in this area. ....
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F250 Experts Need help
![]() | Iowafun
Join Date: Jul 2004 Posts: 955 Central Iowa ![]() ![]() |
2006-08-14 133300
I thought it was a speed sensor due to the need for it for the ABS and the speedo. Turns out it was the rear axle speed sensor. I didn't get time to hit an auto parts store for a diagnosis due to job interview call-backs (good for me). So I dropped it off this morning and they found which one it was and replaced it. Everything works now. ....
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F250 Experts Need help
![]() | unit5alive
Join Date: Jul 2003 Posts: 250 Latrobe Pa ![]() |
2006-10-19 136057
The sensor on top of the rear end is bad ! , Craig. ....
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