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.

 

[Ah GetFd]

Should never be changed.

All the Kia Stinger Service manuals say Not Required

 

[oddball]

Granted, I was being very lazy and just guessing off of what a particular vendor sells as a package with a new pan/filter.

 

[Ah GetFd]

I state again. I see no reason to change the transmission fluid when the manufacture (who offers warranty), does not recommend any change at all.

Now, if it was required (along with every other maintenance requirement) don't you think KIA would have mandated it throughout the life of the vehicle?

If it is not broken.....don't fix it.

 

[5tinger]

Idea is that a simple drain and refill done periodically will help extend the "optimal" performance over the life of the transmission.

 

[Ah GetFd]

When something is not meant to be messed with......it is more likely that when someone does.....they are going to stuff it up.

They are going to do this incorrectly.....hence people coming in here,.......and asking how to do it........

You know

it's just mindless crap.

oh it should extend the life. .....

How do you know? If it did wouldn't KIA WANT this to be done? Like every other fluid change? Even if it just gave them more maintenance to do to make MONEY. Wouldn't you think they would want you to do this?

And you are from Australia........where I thought you might be a bit smarter at this...

 

[Ah GetFd]

Every manual from Europe to Russia to Australia.............

 

[Thomby]

If we're using warranty coverage as their motivation, that's at most 100k, and for the majority of cars 60k. For many people that's "lifetime", but for others it's not.

A working fluid subject to extreme heat, pressure, and stress in an environment with clutches that wear will suffer degradation, so it's reasonable to wonder where that finite period of reasonable performance ends, and if putting fresh fluid in sooner would protect the aging clutches and bearings.

Every piece of commercial equipment has a transmission service interval, and for enthusiasts on a performance car forum who tune or drive more aggressively than your average "lease for two years and replace it" commuter, I think it makes sense to ask what a hard-use maintenance regimen should be.

 

[LordKOTL]

If we're using warranty coverage as their motivation, that's at most 100k, and for the majority of cars 60k. For many people that's "lifetime", but for others it's not.

A working fluid subject to extreme heat, pressure, and stress in an environment with clutches that wear will suffer degradation, so it's reasonable to wonder where that finite period of reasonable performance ends, and if putting fresh fluid in sooner would protect the aging clutches and bearings.

Every piece of commercial equipment has a transmission service interval, and for enthusiasts on a performance car forum who tune or drive more aggressively than your average "lease for two years and replace it" commuter, I think it makes sense to ask what a hard-use maintenance regimen should be.

US manual for 2022 states to change at 60k miles or 100,000km for severe conditions. Normal conditions (i.e. highway only) says no maintenance.