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Diagnostic codes

Tiny
TAHRRINGTON1
  • MEMBER
  • 2003 FORD CROWN VICTORIA
  • 4.6L
  • V8
  • 2WD
  • AUTOMATIC
  • 139,000 MILES
I have a p71 police interceptor. I have replaced the transmission solenoids and fluids, but it still show codes p0755 and p0753 and the o/o light flashes when I drive it. Vehicle does shift but not as smooth as I feel it can. No clanking or jumping when it shifts just a hesitation before it shifts to overdrive. I have reset the codes with diagnostic tool, but codes come back after driving it a few miles along with flashing o/o light. I am thinking the ecm is that a possible cause or should I look elsewhere? Is there a way to test the ecm? Thank you.
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Saturday, July 16th, 2016 AT 2:22 PM

1 Reply

Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Have a transmission professional look at it, it is either a valve body problem or a clutch seal/clutch pak. If you changed fluid and it was dark brown or black when you first pulled pan time for a rebuild. It also could be the clutch in torque converter is shot.
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Saturday, July 16th, 2016 AT 3:40 PM

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