Tranmission Fluid flush and filter change

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J B pdt

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How often do you get your transmission fluid changed out and filter changed?
 

gat0r

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45k is interval for severe duty schedule on trans fluid.
normal is around 97k

i'll do my filter @~70-75k
 

Bob2C

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Did mine @24k. Wanted factory fill out. Changed about 10qts to AMSOIL ATF. 10k miles later. No issues. Smooth. Might be overkill but it’s cheap insurance IMO


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smokey_mountain

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Another option is to send ATF in for UOA and see what they say. Visual and sniff test is not reliable, factory fill ATF in my 2020 truck at 17.5K looked dark brown almost black on a probe and this truck does not even tow but it has severe short trip regimen due to COVID with twice a month of 5-6 hours of highway. If severe driving is at 45K miles then that ATF will look pitch black, but perhaps UOA will still be perfectly acceptable. UOA is an only way to know.
 

SuperOldSchool

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BG1988

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Last edited:

Bob2C

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you used this one correct?


OE Fuel-Efficient Synthetic Automatic Transmission Fluid OTL - AMSOIL


mine has a drain plug on it makes it easier but I would still have it taken off and change both filters on it...
I used this one. Little more expensive but I think it’s worth it. I have about 15k miles on the oil and it’s still cherry red



https://www.amsoil.com/p/signature-series-fuel-efficient-synthetic-automatic-transmission-fluid-atl/


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