Tranmission Fluid flush and filter change

[J B pdt]

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

 

[FrankU]

Mines done at @ 40K miles

 

[gat0r]

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

i'll do my filter @~70-75k

 

[Bob2C]

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]

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.

 

[Gmfm]

60k filter change and pan drain no flush

 

[Big Mama]

Fluid change at 50k had complete flush at 100k.

 

[SuperOldSchool]

Read your manual- all recommended services are clearly outlined.

You should assume the Severe Interval, since most have a lot of stop and go or maybe towing service.

Dealer did filter and fluid change at 45k (severe service interval).

I just did it again about 34k later myself:

https://www.tahoeyukonforum.com/threads/changed-my-filter-and-fluid-on-8l90-8-speed-today.126362/


fresh fluid is always best.

 

[BG1988]

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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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...

 

[Bob2C]

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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