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No No No!!!

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Old Apr 21, 2006 | 08:41 PM
  #1  
79f-250custom's Avatar
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No No No!!!

well, im having some tranny probs with my truck.
just today i got in my truck to haul some feed and hay to some calfs in my pasture and noticed my speedo wasnt working. so i floored it and it went all the way to like 3k before it shifted. so then as i was comming back i eased into it and it wouldnt shift untill it hit the yellow line.
WTF
please dont tell me that my tranny is messed up alread. ohh and i also noticed that my tow haul light {off} was flashing on and off. please tell me this is a simple fuse or somehting under 100 bux to fix.
Mitch
 
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Old Apr 21, 2006 | 09:48 PM
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could be speed sensor or something like that. a scan will be needed to read the codes for the transmission
 
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Old Apr 21, 2006 | 10:15 PM
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thanks for the input man! but why is my speedo not workin?
mitch
 
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Old Apr 21, 2006 | 10:23 PM
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Check the speed sensor on your rear diff. Could have wiggled loose. Or as was stated do a code scan. I had the same issue, but mine was a valve body problem.
 
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Old Apr 21, 2006 | 10:41 PM
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if the spped sensor has an issue no speedo and no speed signal for the computer to shift the trans.
 
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Old Apr 21, 2006 | 11:05 PM
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I second the VSS. The computer MUST know how fast you are going. No VSS signal and the computer is operating in the dark.
 
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Old Apr 22, 2006 | 12:41 AM
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pull your old one out before you go to ford. they give out the wrong ones all the time.
 
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Old Apr 22, 2006 | 12:53 AM
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so its not the acual tranny going bad its some other small thing??
thanks so much guys!!!
Mitch
 
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Old Apr 22, 2006 | 12:55 AM
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on top of your rear diff. it has a wiring harness coming off of it. i think a 10mm bolt holding it on and $80 bucks at ford. dont quote me on the price but i think.
 
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Old May 1, 2006 | 03:18 PM
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ok i pulled it off. how do i tell if its bad or not? thanks
Mitch
 
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Old May 1, 2006 | 04:00 PM
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ohh and another thing i forgot to say when i was driving it. my overdrive off light would come on and off. and and i would put it in to first and shift into 2nd it would shift fine. but when i had it in drive it wouldnt shift at all. reverse works fine also.
Mitch
 
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Old May 1, 2006 | 05:45 PM
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OK, well i put it back on and it worked again! but i broke the clips that hold on the plug to the sensor. so how should i hold that on there?? or should i just get new 1s?
if you think i can clean it up what should i use to clean that up?? it is so full of crud its not even funny.
thanks
Mitch
 
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Old May 1, 2006 | 06:07 PM
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so you replaced it or put the old one on?
 
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Old May 1, 2006 | 06:32 PM
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i put the old 1 on for now, its not driving on the road yet. dont get my license till the 18th. and ill use that one till july if it holds up. want to spend my money on stacks and gauges. but we will see what happens.
Mitch
 
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