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Re: 1996 grand marquis tranny shutter at 55 - 60 MPH
At the dealer here, getting a transmission fluid flush and transfusion. The dealer recommended this first and if the shudder continues then they suspect a locking up torque converter.
I am skeptical, as my issue seems to only happen when the vehicle is wet / cold.
My next investigation will be the transmission shift sensor connection. I figure if the wire/connector is corroded at the transmission, and conditions are wet, then the signal could be comrimised to the ICM and TCM.
On another note, I am surprised by the lack of knowledgeable responses and contributions on this forum. It is rather lacking.
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