I know this has been discussed many times but my problem seems to be different. I just took the truck on a 1200 mile trip to Daytona, FL and it did great all except for a few strange downshift occurances. The first was while exiting the interstate. I got off the ramp after about 250 miles at 80 mph and was coming to a stop (trans temp 190, outside temp 95). Just as I reched the red light at the end of the ramp it truned green and I accelerated. The truck reved like it was in neutral and the slamed into gear. After this it seem to be fine. Later that day while coming to a stop it a parking lot I have another harsh downshift.

I have read here that a reflash will help this, but I just had the new programs put in about 2 months ago, to correct the cruise control surging issue. I had never seen this problem before the reprogram, but it did fix the cruise control issue. Fixed one caused another!!Censored

BTW, the truck is an 01 extended cab 4x4 with 90K and everything is STOCK. Spin off filter changed 4k miles ago, and fluid looks and smells new.

Everything in the TCM was reset when you had the controller updated and depending on you driving style not all of the shift may be adapted in yet. You may have done a power downshift that hasn't been adapted in so it flared. The bad downshift may be somewhat related. My advice is check the fluid level, keep driving and see if it happens again.

Thanks for the advice. It does seem to be getting better and the fluid looks good. I know this is an adaptive transmission, so would the fact that the wife drives the truck 5 days a week, and I get her (the truck) on the weekends explain why it seems to only act up while I'm driving? Has my truck learned to drive like a GIRL??

Thanks for the advice. It does seem to be getting better and the fluid looks good. I know this is an adaptive transmission, so would the fact that the wife drives the truck 5 days a week, and I get her (the truck) on the weekends explain why it seems to only act up while I'm driving? Has my truck learned to drive like a GIRL??

Could be... When my wife drives my truck, I can tell a difference in the shifting since she doesn't "firewall" it at every stopsign, traffic light & turn. ):h

Actually yes, that could be it. The transmission adapts depending on how it's driven. So if you baby it most of the time it may take awhile to dial in the more aggressive shifts.