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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

1990 F250 7.3 DIESEL

 
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Old 02-27-2011, 07:10 AM
slasherman3
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1990 F250 7.3 DIESEL

I have a 1990 f250 with a 7.3 diesel with a auto trans with overdrive and the other day i was driving and i push the overdrive button to off everything was working fine then i push the button to on after a bit i notice the tack was not working and the yellow light stays on the button the trans will not pull out in second unless i put the shifter in second and will not go into overdrive it wants to pull out in drive. i change tack sensor checked fuses change cluster in dash i put a new rebuilt trans in a week before this
 
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Old 02-27-2011, 11:59 AM
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inspect the wires closely going into the tach sensor.
there are also relays in the power distribution box to look into.
 
 
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