Transmission Fluid Change Question

[ht_addict]

Car (2020)just hit 100k/km. Looking to get Fluid changed out on the transmission. How many times should it be emptied and filled to remove old Fluid. Has anyone removed/replaced the pan to clean out debris stuck to the magnet and give it a good clean.

 

[oddball]

If your goal is 100% fluid change then use a fluid change machine or a shop that uses one. Cheap ones on ebay are usually around $300 (US).

Dropping the pan replaces ~8 quarts-ish out of, I dunno, 13ish? You have to do the math to figure out how many drain/fill cycles to get to the percentage of new fluid you want.

However, a complete change really isn't necessary. A single drain and fill is plenty good for the trans and it'll be happy for another 100km. The only time a full flush is really necessary is if the fluid is burnt or there's been a mechanical failure.

 

[Thomby]

Dropping the pan replaces ~8 quarts-ish out of, I dunno, 13ish?

Are you sure about that? I see 9.7qt / 9.2l in documentation, with other posts claiming ~4qts from the drain plug (and anywhere from another 1.5qt to 3-4qts from dropping the pan).

 

[Ohiocruiser]

Are you sure about that? I see 9.7qt / 9.2l in documentation, with other posts claiming ~4qts from the drain plug (and anywhere from another 1.5qt to 3-4qts from dropping the pan).

It took me under 6 quarts to replace it with transmission pan. Takes about 5 without dropping pan.

 

[Thomby]

It took me under 6 quarts to replace it with transmission pan. Takes about 5 without dropping pan.

If that's the case, an answer to @ht_addict's question is that two changes should leave you ~90% fresh fluid (a little over 8qts new, a little over 1qt old).

 

[rk88]

Check out this video.

Should answer all your questions.