95XLT Tranny Code 647

[DrewP]

About 6 months ago my "O/D OFF" light started flashing and my 95 XLT started shifting kind of hard. Since I was on vacation with no code reader, I reset the computer and the car started acting normal with no problems till today. Today, while I was driving the same thing happened, but I drove it home and read out code 647--"Transmission-incorrect gear ration - third gear." I looked this up in my repair manual and it says "Improper gear selection depending on failure or mode and manual lever position. Shift errors may also be due to internal transmission concerns(stuck valves, damaged friction material). My manual also says: Note **May also be generated by some other non-electric transmission hardware system.

My explorer has 63,000 on it and I just changed the fluid/filter about a month ago and saw no worrisome signs. Should I just reset the computer and keep driving? Or does anybody have any suggestions for me?

Thanks advance for any helpful suggestions.

Drew Payne

 

[mikefox]

I also have a '95. In early February with just over 70K miles on it the O/D light started to blink constantly. I got it into a tranny shop because I had lost overdrive and it started to shift poorly. I also had a code or 2 and tried the reset of the computer but it only worked for a very short time. It needed a complete overhaul to the tune of $2300 and some change. It had burned the O/D clutch pack and band and there was debris in the pan. I had bought it used last July with 63K on it. I don't know the service record of it if it had ever had a tranny service done to it. All I can say is thank God for the used car warranty I bought for it. If I were you I would take it to a good tranny shop and have them check it out. Good luck.

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mike fox

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