WARNING: THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINE. There is a TSB for intermittent OD light flashing with codes 645 or 646 or 647 or 648.Ħ47 as you mention idicates that the PCM has detected loss of third gear. Again, I assume that the computer and the transmission are out of sync because of the false code. The vehicle does not run as smoothly with the o/d light flashing. There is no slipping in the transmission so I would assume there it is a false code. I was told that they had also put a new wiring harness on the trans as well. Test drove with scanner and vehicle did not reset code. Installed an extra grounding strip from the transmission to the frame. Adjusted the EPC solenoid up by about 10PSI and installed new pan gasket and filled with fluid. Removed pan and checked for condition in pan,it was very clean. Codes Found 172 EGO, 176 EGO and 647-incorrect 3rd gear ratio.” Here is what they tried on the vedicle–hooked up a line pressure guage and checked pressure–135-140 psi in drive, which was good. Test drove, vehicle had several engines codes and 1 transmission code. “hooked up hand held scan tool, monitored signals from TPS, VSS, and A & B solenoids. Here are the notes that were made by the people at the transmission shop. I just got in from getting the vehicle from the shop and once again the o/d light started flashing before I got it to the house about 50 miles from the shop. For the brief time that the o/d light was not flashing, the shifting was smoother. The rough shifting is usually downshift, second to first. Thanks for your response Jagree142 and Transman618. Their work is still under their warranty that is why I have stuck with them rather than going to another shop.Īnyone have a similar experience with a Explorer Trans and what did you do to fix it? The transmission shop says there is nothing wrong with the transmission. Then the o/d light came back on and the transmission shifts roughly and the gas mileage has tanked (pardon the pun). This time the light remained off for about 1000 miles and the transmission performed smoothly. Took it back to the shop- the transmission was practically rebuilt (according to them). Same thing–by the time I got it home, the light was flashing again. Took it back to the shop, they replaced the computer. By the time I got home (about 50 miles), the light was flashing again. They replaced some pistons and gaskets in the transmission and the flashing light was off when I picked the vehicle up. Took it to a transmission shop for repair. 2 weeks after buying it, the o/d light began flashing on the dash indicating a problem with the transmission. Had it checked out by a mechanic before buying. I bought a 1995 Ford Explorer with 110000.
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