Clunky 10R80- do i just live with it?

[Jmitchelltfo]

I had several very hard downshifts that almost made me feel like I was rear ended. I was also getting some funky downshifts that were inconsistent and clunky.

Broke out the vac to pull the old fluid from the pan (did this process twice for a total of 10 liters) and also added in a 10 ounce bottle of Lubeguard Platinum. I haven't had any of the hard downshifts, but after 5k miles or so, some of the clunky shifts are returning already. I'm at 58k and will probably try to get it looked at before the ESP takes over.

I really want to find a dealer close to me that has a 10R80 guru so that I know my transmission is in good hands if they end up rebuilding it with the revised CDF drum. I will probably even offer to pay for any extra parts that aren't covered by the warranty, if the tech thinks it would be a good idea.

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[freewayman]

I am going to provide an update to this thread.

After resetting the adaptive tables, and about 5000 miles of mixed driving in the city and highways, my downshift clunks coming to a stop are completely gone. For the record: I did nothing else, did not touch the fluid or anything. It seems like it just takes a super long time for the shift adaptations to lock in, specifically the torque converter unlock timing on coast down/braking.

 

[Jerome10]

Wow that’s great when things work out that easily!

 

[2Lazy2P]

I just had the dealer look into my transmission issues. Here are the tech's notes. It will be interesting to see how it performs over the next 500 miles.

 

[FaaWrenchBndr]

So if you care about your truck and you wanna try to make it last 300k, take whatever service interval Ford specs……cut it in half if not 1/3

 

[FaaWrenchBndr]

I just had the dealer look into my transmission issues. Here are the tech's notes. It will be interesting to see how it performs over the next 500 miles.

How many miles do you have?
If you fluids turning to the brown side, might be time to do a drain and fill

 

[2Lazy2P]

Mileage is 30,876.

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