Quote Originally Posted by FordMan77 View Post
Is the slipping when it tries to shift from 3rd to OD? If so then I fear you are slowly loosing OD. The splines on the end of the shaft that engages OD is not hardened and as time goes on they wear down and eventually won't engage the 4th clutch hub. Then you will be running about 2500 or so at 60mph. I drove my 00GT this way for at least 2 years before I replaced the trans. and it was still shifting fine, except no OD.
Thx for the input.. I don't think that's what's happening... when the TC is locked and I'm at cruising speed (say 65 mph) and I go and try to pass someone or "drop the hammer" as they say, on the gas pedel, the TC will unlock (downshift I guess you could call it) then the car will pull, but at the top of the power band, right before it goes to shift into the next gear (mind you, my foot is still to the floor), boom.. no shifting... while driving normally, it will shift perfectly fine... and at cruising speed (65 or higher) it is fine.. I just took her for a 6 hour drive accross state last month and got 28.2 mpg's and I believe the rpm's were at or under 2000.. so I don't think its OD... but I could be mistaken, I am very unfamiliar with these trannies.. I'm used to my 4L70e's and newer lol...

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