Transmission woes

[RyanZ71]

I posted this a few months ago didn't get very many responses, I'll try it again.

 

Truck currently has 96,000 miles, everything shifts smoothly, problem I have is that on warm days, (75 degrees+ outside) after driving for 15+ min at highway speeds of 65MPH+ and after maybe going up a slight hill the transmission, while in overdrive, will act as though overdrive isn't there and the RPMs go up as though I were in drive instead of overdrive. if I let off the gas, it falls back down to IDLE RPMs (instead of it staying at a steady RPM like it is supposed to do when your in gear) and once I apply gas it goes right back up as though it were in drive. It'll do this for awhile and then my overdrive comes back and it'll drive fine.

[dannyukonxl]

so it kind of drives like its in tow haul mode, maybe its a computer problem or might need a reflash or something of the sort.. just some 2 cents

[RyanZ71]

so it kind of drives like its in tow haul mode, maybe its a computer problem or might need a reflash or something of the sort.. just some 2 cents

 

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I don't think I'd describe it as Tow/Haul mode, even when it's in tow haul mode and the transmission is working properly, the RPMs don't drop down to idle when my foot is taken off the gas.

[mcreyaufmiller]

Go to bulkpart website and describe your problem to the contact us section. include your year, make, and model in the email. If there is a fix, they will have it. But to me it sounds like a torque converter going bad.